Precalculus Flashcards: Special Triangles Unit Circle In Trigonometry

Study Special Triangles Unit Circle In Trigonometry in Precalculus with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

QUESTION

What are the side ratios in a $\frac{\pi}{4}$ - $\frac{\pi}{4}$ - $\frac{\pi}{2}$ triangle?

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ANSWER

$1:1:\sqrt{2}$ . 45-45-90 triangle has equal legs and hypotenuse = leg × $\sqrt{2}$ .

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What this deck covers

This deck focuses on Special Triangles Unit Circle In Trigonometry, giving you a quick way to review the definitions, rules, and examples that matter most for 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.

Practice questions

1 of 49Practice questions for this set

On the unit circle, an angle of

\pi/3

is drawn in standard position, creating a 30-60-90 triangle with radius

1

. Based on the special triangle ratios and

\cos\theta

being the

x

-coordinate, what is the exact value of

\cos(\pi/3)

Choose an answer

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