Precalculus Flashcards: Extending Trigonometric Functions With Unit Circle

Study Extending Trigonometric Functions With Unit Circle in Precalculus with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

QUESTION

At which angles is $\tan\theta$ undefined on the unit circle?

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ANSWER

$\theta=\frac{\pi}{2}+k\pi$ , for integers $k$ . Where $\cos\theta = 0$ , making division undefined.

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Precalculus: Extend Trig with Unit Circle

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34 cards

What this deck covers

This deck focuses on Extending Trigonometric Functions With Unit Circle, 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 50Practice questions for this set

An angle

\theta=\frac{11\pi}{6}

is drawn in standard position on the unit circle. For the angle described, what is the value of

\cos(\theta)

Choose an answer

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