All Trigonometry Resources
Example Question #1 : Trigonometric Operations
Find the value of the trigonometric function in fraction form for triangle .
What is the cosine of ?
The cosine of an angle is the value of the adjacent side over the hypotenuse.
Example Question #2 : Trigonometric Operations
If and , what is the value of ?
Example Question #3 : Trigonometric Operations
What is the value of ?
Solve each term separately.
Add both terms.
Example Question #4 : Trigonometric Operations
Determine the value of .
Rewrite in terms of sines and cosines.
Simplify the complex fraction.
Example Question #5 : Trigonometric Operations
Find the value of .
To find the value of , solve each term separately.
Sum the two terms.
Example Question #6 : Trigonometric Operations
Select the ratio that would give Tan B.
None of the other answers.
We need the Tan B. Which side lengths correspond to this ratio?
Example Question #1 : Sin, Cos, Tan
The tangent function has a period of units. That is,
for all .
Since , we can rewrite the original expression as follows:
Example Question #8 : Trigonometric Operations
First, convert the given angle measure from radians to degrees:
Next, recall that lies in the fourth quadrant of the unit circle, wherein the cosine is positive. Furthermore, the reference angle of is
Hence, all that is required is to recognize from these observations that
which is .
Example Question #2 : Sin, Cos, Tan
What is the result when the following expression is simplified as much as possible?
Because is an odd function, we can rewrite the second term in the expression.
We now use a double-angle formula to expand the first term.
Because they are reciprocals, .
Example Question #10 : Trigonometric Operations
Round to the nearest hundredth.
Use your calculator to find:
None of the above
Before plugging the function into the calculator make sure the mode of the calculator is set to degrees,
Plug in which equals to .