AP Precalculus Flashcards: Sine Cosine And Tangent

Study Sine Cosine And Tangent in AP Precalculus with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

AP Precalculus

Sine Cosine And Tangent

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QUESTION

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Find $\text{tan}(\frac{\pi}{4})$ using the unit circle.

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ANSWER

This is a standard angle value on the unit circle.

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What this deck covers

This deck focuses on Sine Cosine And Tangent, giving you a quick way to review the definitions, rules, and examples that matter most for AP Precalculus.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

All flashcards

Flashcard 1: Find $\text{tan}(\frac{\pi}{4})$ using the unit circle.

Answer:

This is a standard angle value on the unit circle.

Flashcard 2: What is the value of $\text{cos}(\text{\textpi})$ ?

Answer: -1. At $\pi$ , the point is $(-1, 0)$ on the unit circle.

Flashcard 3: What is the period of the cosine function?

Answer: $2\pi$ . Cosine repeats its values every $2\pi$ radians.

Flashcard 4: What is the cosine of $60^\text{o}$ ?

Answer: $\frac{1}{2}$ . From the $30°-60°-90°$ triangle or unit circle.

Flashcard 5: What is the phase shift of $y = \cos(x + \frac{\pi}{6})$ ?

Answer: $\frac{\pi}{6}$ to the left. A positive value inside parentheses shifts the graph left.

Flashcard 6: What is the phase shift of $y = \sin(x - \frac{\pi}{4})$ ?

Answer: $\frac{\pi}{4}$ to the right. A negative value inside parentheses shifts the graph right.

Flashcard 7: Convert $\frac{\pi}{3}$ radians to degrees.

Answer: $60^\circ$ . Use the formula $\text{degrees} = \text{radians} \times \frac{180^\circ}{\pi}$

Flashcard 8: What is the period of the tangent function?

Answer: $\pi$ . Tangent repeats its values every $\pi$ radians.

Flashcard 9: What is the reciprocal of sine?

Answer: Cosecant. Cosecant is $\frac{1}{\sin(x)}$ .

Flashcard 10: What is the tangent of $45^\text{o}$ ?

Answer:

In a $45°-45°-90°$ triangle, opposite equals adjacent.

Flashcard 11: Find the tangent of angle $C$ if $\text{sin}(C) = \frac{3}{5}$ and $C$ is in Quadrant I.

Answer: $\frac{3}{4}$ . First find $\cos C = \frac{4}{5}$ , then $\tan C = \frac{\sin C}{\cos C}$ .

Flashcard 12: State the definition of tangent in a right triangle.

Answer: Tangent is the ratio of the opposite side to the adjacent side. This is the basic TOA definition from SOH-CAH-TOA.

Flashcard 13: What is the general solution for $\text{sin}(x) = 0$ ?

Answer: $x = n\text{\textpi}$ , where $n \text{ is an integer}$ . Sine equals zero at integer multiples of $\pi$ .

Flashcard 14: Find the cosine of angle $B$ if $\text{sin}(B) = \frac{5}{13}$ and $B$ is in Quadrant I.

Answer: $\frac{12}{13}$ . Use $\sin^2 B + \cos^2 B = 1$ to find $\cos B = \sqrt{1 - (\frac{5}{13})^2}$ .

Flashcard 15: Convert $45^\text{o}$ to radians.

Answer: $\frac{\text{\textpi}}{4}$ . Use the formula $\text{radians} = \text{degrees} \times \frac{\pi}{180°}$ .

Flashcard 16: What is the reference angle for $210^\text{o}$ ?

Answer: $30^\text{o}$ . Reference angle is $210° - 180° = 30°$ .

Flashcard 17: What is the phase shift of $y = \sin(x - \frac{\pi}{4})$ ?

Answer: $\frac{\pi}{4}$ to the right. A negative value inside parentheses shifts the graph right.

Flashcard 18: State the definition of cosine in a right triangle.

Answer: Cosine is the ratio of the adjacent side to the hypotenuse. This is the basic CAH definition from SOH-CAH-TOA.

Flashcard 19: Which quadrant has positive sine and cosine values?

Answer: Quadrant I. All trigonometric functions are positive in Quadrant I.

Flashcard 20: What is the value of $\tan(\pi)$ ?

Answer:

Since $\tan(\pi) = \frac{\sin(\pi)}{\cos(\pi)} = \frac{0}{-1}$ .

Flashcard 21: What is the phase shift of $y = \cos(x + \frac{\pi}{6})$ ?

Answer: $\frac{\pi}{6}$ to the left. A positive value inside parentheses shifts the graph left.

Flashcard 22: What is the tangent of an angle in Quadrant IV?

Answer: Negative. Tangent is negative in Quadrants II and IV.

Flashcard 23: Find $\cos\left(\frac{\pi}{3}\right)$ using the unit circle.

Answer: $\frac{1}{2}$ . This is a standard angle value on the unit circle.

Flashcard 24: What is the reciprocal of tangent?

Answer: Cotangent. Cotangent is $\frac{1}{\tan(x)}$ .

Flashcard 25: What is the tangent of $0^\text{o}$ ?

Answer:

Since $\tan(0°) = \frac{\sin(0°)}{\cos(0°)} = \frac{0}{1}$ .

Flashcard 26: What is the sine of $30^\text{o}$ ?

Answer: $\frac{1}{2}$ . From the $30°-60°-90°$ triangle or unit circle.

Flashcard 27: Find $\sin\left(\frac{\pi}{6}\right)$ using the unit circle.

Answer: $\frac{1}{2}$ . This is a standard angle value on the unit circle.

Flashcard 28: State the definition of tangent in a right triangle.

Answer: Tangent is the ratio of the opposite side to the adjacent side. This is the basic TOA definition from SOH-CAH-TOA.

Flashcard 29: Find $\cos\left(\frac{\pi}{3}\right)$ using the unit circle.

Answer: $\frac{1}{2}$ . This is a standard angle value on the unit circle.

Flashcard 30: What is the period of the tangent function?

Answer: $\text{\textpi}$ . Tangent repeats its values every $\pi$ radians.

Flashcard 31: What is the reference angle for $\frac{7\pi}{6}$ ?

Answer: $\frac{\pi}{6}$ . Reference angle is $\frac{7\pi}{6} - \pi = \frac{\pi}{6}$ .

Flashcard 32: Which quadrant has positive sine and cosine values?

Answer: Quadrant I. All trigonometric functions are positive in Quadrant I.

Flashcard 33: What is the reciprocal of cosine?

Answer: Secant. Secant is $\frac{1}{\cos(x)}$ .

Flashcard 34: What is the amplitude of $y = 3\text{sin}(x)$ ?

Answer:

The coefficient of the sine function is the amplitude.

Flashcard 35: What is the general solution for $\sin(x) = 0$ ?

Answer: $x = n\pi$ , where $n \text{ is an integer}$ . Sine equals zero at integer multiples of $\pi$ .

Flashcard 36: What is the period of the sine function?

Answer: $2\pi$ . Sine repeats its values every $2\pi$ radians.

Flashcard 37: What is the sine of $90^\text{o}$ ?

Answer:

At $90°$ , the point is $(0, 1)$ on the unit circle.

Flashcard 38: What is the tangent of $0^\text{o}$ ?

Answer:

Since $\tan(0^\circ) = \frac{\sin(0^\circ)}{\cos(0^\circ)} = \frac{0}{1}$ .

Flashcard 39: State the definition of sine in a right triangle.

Answer: Sine is the ratio of the opposite side to the hypotenuse. This is the basic SOH definition from SOH-CAH-TOA.

Flashcard 40: What is the value of $\cos(\pi)$ ?

Answer: -1. At $\pi$ , the point is $(-1, 0)$ on the unit circle.

Flashcard 41: State the definition of cosine in a right triangle.

Answer: Cosine is the ratio of the adjacent side to the hypotenuse. This is the basic CAH definition from SOH-CAH-TOA.

Flashcard 42: What is the reciprocal of tangent?

Answer: Cotangent. Cotangent is $\frac{1}{\tan(x)}$ .

Flashcard 43: Find the sine of angle $A$ if $\text{cos}(A) = \frac{3}{5}$ and $A$ is in Quadrant I.

Answer: $\frac{4}{5}$ . Use $\sin^2 A + \cos^2 A = 1$ to find $\sin A = \sqrt{1 - (\frac{3}{5})^2}$ .

Flashcard 44: State the Pythagorean identity involving sine and cosine.

Answer: $\text{sin}^2 \theta + \text{cos}^2 \theta = 1$ . This comes from the Pythagorean theorem applied to the unit circle.

Flashcard 45: What is the reciprocal of cosine?

Answer: Secant. Secant is $\frac{1}{\cos(x)}$ .

Flashcard 46: Convert $\frac{\text{\textpi}}{3}$ radians to degrees.

Answer: $60^\text{o}$ . Use the formula $\text{degrees} = \text{radians} \times \frac{180°}{\pi}$ .

Flashcard 47: What is the tangent of an angle in Quadrant IV?

Answer: Negative. Tangent is negative in Quadrants II and IV.

Flashcard 48: What is the tangent of $45^\text{o}$ ?

Answer:

In a $45°-45°-90°$ triangle, opposite equals adjacent.

Flashcard 49: What is the cosine of $0^\text{o}$ ?

Answer:

At $0°$ , the point is $(1, 0)$ on the unit circle.

Flashcard 50: What is the value of $\text{sin}(\text{\textpi})$ ?

Answer:

At $\pi$ , the point is $(-1, 0)$ on the unit circle.

Flashcard 51: What is the amplitude of $y = -2\text{cos}(x)$ ?

Answer:

The absolute value of the coefficient is the amplitude.

Flashcard 52: Find $\tan(\frac{\pi}{4})$ using the unit circle.

Answer:

This is a standard angle value on the unit circle.

Flashcard 53: What is the amplitude of $y = -2\text{cos}(x)$ ?

Answer:

The absolute value of the coefficient is the amplitude.

Flashcard 54: Find the tangent of angle $C$ if $\text{sin}(C) = \frac{3}{5}$ and $C$ is in Quadrant I.

Answer: $\frac{3}{4}$ . First find $\cos C = \frac{4}{5}$ , then $\tan C = \frac{\sin C}{\cos C}$ .

Flashcard 55: What is the period of the cosine function?

Answer: $2\pi$ . Cosine repeats its values every $2\pi$ radians.

Flashcard 56: What is the vertical shift of $y = \text{tan}(x) + 3$ ?

Answer: 3 units up. Adding a constant outside the function shifts vertically.

Flashcard 57: What is the cosine of an angle in Quadrant III?

Answer: Negative. Cosine is negative in Quadrants II and III.

Flashcard 58: What is the period of the sine function?

Answer: $2\pi$ . Sine repeats its values every $2\pi$ radians.

Flashcard 59: Convert $45^\text{o}$ to radians.

Answer: $\frac{\text{\textpi}}{4}$ . Use the formula $\text{radians} = \text{degrees} \times \frac{\pi}{180°}$ .

Flashcard 60: What is the value of $\text{tan}(\text{\textpi})$ ?

Answer:

Since $\tan(\pi) = \frac{\sin(\pi)}{\cos(\pi)} = \frac{0}{-1}$ .

Flashcard 61: What is the reciprocal of sine?

Answer: Cosecant. Cosecant is $\frac{1}{\sin(x)}$ .

Flashcard 62: What is the reference angle for $\frac{7\pi}{6}$ ?

Answer: $\frac{\pi}{6}$ . Reference angle is $\frac{7\pi}{6} - \pi = \frac{\pi}{6}$ .

Flashcard 63: What is the cosine of an angle in Quadrant III?

Answer: Negative. Cosine is negative in Quadrants II and III.

Flashcard 64: Find the sine of angle $A$ if $\text{cos}(A) = \frac{3}{5}$ and $A$ is in Quadrant I.

Answer: $\frac{4}{5}$ . Use $\sin^2 A + \cos^2 A = 1$ to find $\sin A = \sqrt{1 - (\frac{3}{5})^2}$ .

Flashcard 65: What is the value of $\text{sin}(\text{\textpi})$ ?

Answer:

At $\pi$ , the point is $(-1, 0)$ on the unit circle.

Flashcard 66: What is the sine of $30^\text{o}$ ?

Answer: $\frac{1}{2}$ . From the $30°-60°-90°$ triangle or unit circle.

Flashcard 67: What is the cosine of $0^\text{o}$ ?

Answer:

At $0°$ , the point is $(1, 0)$ on the unit circle.

Flashcard 68: What is the vertical shift of $y = \text{tan}(x) + 3$ ?

Answer: 3 units up. Adding a constant outside the function shifts vertically.

Flashcard 69: What is the cosine of $60^\text{o}$ ?

Answer: $\frac{1}{2}$ . From the $30°-60°-90°$ triangle or unit circle.

Flashcard 70: What is the reference angle for $210^\text{o}$ ?

Answer: $30^\text{o}$ . Reference angle is $210° - 180° = 30°$ .

Flashcard 71: What is the amplitude of $y = 3\text{sin}(x)$ ?

Answer:

The coefficient of the sine function is the amplitude.

Flashcard 72: Find the cosine of angle $B$ if $\text{sin}(B) = \frac{5}{13}$ and $B$ is in Quadrant I.

Answer: $\frac{12}{13}$ . Use $\sin^2 B + \cos^2 B = 1$ to find $\cos B = \sqrt{1 - (\frac{5}{13})^2}$ .

Flashcard 73: What is the sine of $90^\text{o}$ ?

Answer:

At $90°$ , the point is $(0, 1)$ on the unit circle.

Flashcard 74: State the Pythagorean identity involving sine and cosine.

Answer: $\text{sin}^2 \theta + \text{cos}^2 \theta = 1$ . This comes from the Pythagorean theorem applied to the unit circle.

Flashcard 75: State the definition of sine in a right triangle.

Answer: Sine is the ratio of the opposite side to the hypotenuse. This is the basic SOH definition from SOH-CAH-TOA.

AP Precalculus Flashcards: Sine Cosine And Tangent

Sine Cosine And Tangent

What this deck covers

How to use these flashcards

All flashcards

Flashcard 1: Find tan(π4)\text{tan}(\frac{\pi}{4})tan(4π​) using the unit circle.

Flashcard 2: What is the value of cos(\textpi)\text{cos}(\text{\textpi})cos(\textpi)?

Flashcard 3: What is the period of the cosine function?

Flashcard 4: What is the cosine of 60o60^\text{o}60o?

Flashcard 5: What is the phase shift of y=cos⁡(x+π6)y = \cos(x + \frac{\pi}{6})y=cos(x+6π​)?

Flashcard 6: What is the phase shift of y=sin⁡(x−π4)y = \sin(x - \frac{\pi}{4})y=sin(x−4π​)?

Flashcard 7: Convert π3\frac{\pi}{3}3π​ radians to degrees.

Flashcard 8: What is the period of the tangent function?

Flashcard 9: What is the reciprocal of sine?

Flashcard 10: What is the tangent of 45o45^\text{o}45o?

Flashcard 11: Find the tangent of angle CCC if sin(C)=35\text{sin}(C) = \frac{3}{5}sin(C)=53​ and CCC is in Quadrant I.

Flashcard 12: State the definition of tangent in a right triangle.

Flashcard 13: What is the general solution for sin(x)=0\text{sin}(x) = 0sin(x)=0?

Flashcard 14: Find the cosine of angle BBB if sin(B)=513\text{sin}(B) = \frac{5}{13}sin(B)=135​ and BBB is in Quadrant I.

Flashcard 15: Convert 45o45^\text{o}45o to radians.

Flashcard 16: What is the reference angle for 210o210^\text{o}210o?

Flashcard 17: What is the phase shift of y=sin⁡(x−π4)y = \sin(x - \frac{\pi}{4})y=sin(x−4π​)?

Flashcard 18: State the definition of cosine in a right triangle.

Flashcard 19: Which quadrant has positive sine and cosine values?

Flashcard 20: What is the value of tan⁡(π)\tan(\pi)tan(π)?

Flashcard 21: What is the phase shift of y=cos⁡(x+π6)y = \cos(x + \frac{\pi}{6})y=cos(x+6π​)?

Flashcard 22: What is the tangent of an angle in Quadrant IV?

Flashcard 23: Find cos⁡(π3)\cos\left(\frac{\pi}{3}\right)cos(3π​) using the unit circle.

Flashcard 24: What is the reciprocal of tangent?

Flashcard 25: What is the tangent of 0o0^\text{o}0o?

Flashcard 26: What is the sine of 30o30^\text{o}30o?

Flashcard 27: Find sin⁡(π6)\sin\left(\frac{\pi}{6}\right)sin(6π​) using the unit circle.

Flashcard 28: State the definition of tangent in a right triangle.

Flashcard 29: Find cos⁡(π3)\cos\left(\frac{\pi}{3}\right)cos(3π​) using the unit circle.

Flashcard 30: What is the period of the tangent function?

Flashcard 31: What is the reference angle for 7π6\frac{7\pi}{6}67π​?

Flashcard 32: Which quadrant has positive sine and cosine values?

Flashcard 33: What is the reciprocal of cosine?

Flashcard 34: What is the amplitude of y=3sin(x)y = 3\text{sin}(x)y=3sin(x)?

Flashcard 35: What is the general solution for sin⁡(x)=0\sin(x) = 0sin(x)=0?

Flashcard 36: What is the period of the sine function?

Flashcard 37: What is the sine of 90o90^\text{o}90o?

Flashcard 38: What is the tangent of 0o0^\text{o}0o?

Flashcard 39: State the definition of sine in a right triangle.

Flashcard 40: What is the value of cos⁡(π)\cos(\pi)cos(π)?

Flashcard 41: State the definition of cosine in a right triangle.

Flashcard 42: What is the reciprocal of tangent?

Flashcard 43: Find the sine of angle AAA if cos(A)=35\text{cos}(A) = \frac{3}{5}cos(A)=53​ and AAA is in Quadrant I.

Flashcard 44: State the Pythagorean identity involving sine and cosine.

Flashcard 45: What is the reciprocal of cosine?

Flashcard 46: Convert \textpi3\frac{\text{\textpi}}{3}3\textpi​ radians to degrees.

Flashcard 47: What is the tangent of an angle in Quadrant IV?

Flashcard 48: What is the tangent of 45o45^\text{o}45o?

Flashcard 49: What is the cosine of 0o0^\text{o}0o?

Flashcard 50: What is the value of sin(\textpi)\text{sin}(\text{\textpi})sin(\textpi)?

Flashcard 51: What is the amplitude of y=−2cos(x)y = -2\text{cos}(x)y=−2cos(x)?

Flashcard 52: Find tan⁡(π4)\tan(\frac{\pi}{4})tan(4π​) using the unit circle.

Flashcard 53: What is the amplitude of y=−2cos(x)y = -2\text{cos}(x)y=−2cos(x)?

Flashcard 54: Find the tangent of angle CCC if sin(C)=35\text{sin}(C) = \frac{3}{5}sin(C)=53​ and CCC is in Quadrant I.

Flashcard 55: What is the period of the cosine function?

Flashcard 56: What is the vertical shift of y=tan(x)+3y = \text{tan}(x) + 3y=tan(x)+3?

Flashcard 57: What is the cosine of an angle in Quadrant III?

Flashcard 58: What is the period of the sine function?

Flashcard 59: Convert 45o45^\text{o}45o to radians.

Flashcard 60: What is the value of tan(\textpi)\text{tan}(\text{\textpi})tan(\textpi)?

Flashcard 61: What is the reciprocal of sine?

Flashcard 62: What is the reference angle for 7π6\frac{7\pi}{6}67π​?

Flashcard 63: What is the cosine of an angle in Quadrant III?

Flashcard 64: Find the sine of angle AAA if cos(A)=35\text{cos}(A) = \frac{3}{5}cos(A)=53​ and AAA is in Quadrant I.

Flashcard 65: What is the value of sin(\textpi)\text{sin}(\text{\textpi})sin(\textpi)?

Flashcard 66: What is the sine of 30o30^\text{o}30o?

Flashcard 67: What is the cosine of 0o0^\text{o}0o?

Flashcard 68: What is the vertical shift of y=tan(x)+3y = \text{tan}(x) + 3y=tan(x)+3?

Flashcard 69: What is the cosine of 60o60^\text{o}60o?

Flashcard 70: What is the reference angle for 210o210^\text{o}210o?

Flashcard 71: What is the amplitude of y=3sin(x)y = 3\text{sin}(x)y=3sin(x)?

Flashcard 72: Find the cosine of angle BBB if sin(B)=513\text{sin}(B) = \frac{5}{13}sin(B)=135​ and BBB is in Quadrant I.

Flashcard 73: What is the sine of 90o90^\text{o}90o?

Flashcard 74: State the Pythagorean identity involving sine and cosine.

Flashcard 75: State the definition of sine in a right triangle.

Flashcard 1: Find $\text{tan}(\frac{\pi}{4})$ using the unit circle.

Flashcard 2: What is the value of $\text{cos}(\text{\textpi})$ ?

Flashcard 4: What is the cosine of $60^\text{o}$ ?

Flashcard 5: What is the phase shift of $y = \cos(x + \frac{\pi}{6})$ ?

Flashcard 6: What is the phase shift of $y = \sin(x - \frac{\pi}{4})$ ?

Flashcard 7: Convert $\frac{\pi}{3}$ radians to degrees.

Flashcard 10: What is the tangent of $45^\text{o}$ ?

Flashcard 11: Find the tangent of angle $C$ if $\text{sin}(C) = \frac{3}{5}$ and $C$ is in Quadrant I.

Flashcard 13: What is the general solution for $\text{sin}(x) = 0$ ?

Flashcard 14: Find the cosine of angle $B$ if $\text{sin}(B) = \frac{5}{13}$ and $B$ is in Quadrant I.

Flashcard 15: Convert $45^\text{o}$ to radians.

Flashcard 16: What is the reference angle for $210^\text{o}$ ?

Flashcard 17: What is the phase shift of $y = \sin(x - \frac{\pi}{4})$ ?

Flashcard 20: What is the value of $\tan(\pi)$ ?

Flashcard 21: What is the phase shift of $y = \cos(x + \frac{\pi}{6})$ ?

Flashcard 23: Find $\cos\left(\frac{\pi}{3}\right)$ using the unit circle.

Flashcard 25: What is the tangent of $0^\text{o}$ ?

Flashcard 26: What is the sine of $30^\text{o}$ ?

Flashcard 27: Find $\sin\left(\frac{\pi}{6}\right)$ using the unit circle.

Flashcard 29: Find $\cos\left(\frac{\pi}{3}\right)$ using the unit circle.

Flashcard 31: What is the reference angle for $\frac{7\pi}{6}$ ?

Flashcard 34: What is the amplitude of $y = 3\text{sin}(x)$ ?

Flashcard 35: What is the general solution for $\sin(x) = 0$ ?

Flashcard 37: What is the sine of $90^\text{o}$ ?

Flashcard 38: What is the tangent of $0^\text{o}$ ?

Flashcard 40: What is the value of $\cos(\pi)$ ?

Flashcard 43: Find the sine of angle $A$ if $\text{cos}(A) = \frac{3}{5}$ and $A$ is in Quadrant I.

Flashcard 46: Convert $\frac{\text{\textpi}}{3}$ radians to degrees.

Flashcard 48: What is the tangent of $45^\text{o}$ ?

Flashcard 49: What is the cosine of $0^\text{o}$ ?

Flashcard 50: What is the value of $\text{sin}(\text{\textpi})$ ?

Flashcard 51: What is the amplitude of $y = -2\text{cos}(x)$ ?

Flashcard 52: Find $\tan(\frac{\pi}{4})$ using the unit circle.

Flashcard 53: What is the amplitude of $y = -2\text{cos}(x)$ ?

Flashcard 54: Find the tangent of angle $C$ if $\text{sin}(C) = \frac{3}{5}$ and $C$ is in Quadrant I.

Flashcard 56: What is the vertical shift of $y = \text{tan}(x) + 3$ ?

Flashcard 59: Convert $45^\text{o}$ to radians.

Flashcard 60: What is the value of $\text{tan}(\text{\textpi})$ ?

Flashcard 62: What is the reference angle for $\frac{7\pi}{6}$ ?

Flashcard 64: Find the sine of angle $A$ if $\text{cos}(A) = \frac{3}{5}$ and $A$ is in Quadrant I.

Flashcard 65: What is the value of $\text{sin}(\text{\textpi})$ ?

Flashcard 66: What is the sine of $30^\text{o}$ ?

Flashcard 67: What is the cosine of $0^\text{o}$ ?

Flashcard 68: What is the vertical shift of $y = \text{tan}(x) + 3$ ?

Flashcard 69: What is the cosine of $60^\text{o}$ ?

Flashcard 70: What is the reference angle for $210^\text{o}$ ?

Flashcard 71: What is the amplitude of $y = 3\text{sin}(x)$ ?

Flashcard 72: Find the cosine of angle $B$ if $\text{sin}(B) = \frac{5}{13}$ and $B$ is in Quadrant I.

Flashcard 73: What is the sine of $90^\text{o}$ ?