Reciprocal & Inverse Trigonometric Functions (AQA A-Level Mathematics): Flashcards

$\csc \theta = \frac{1}{\sin \theta}$

$\sec \theta = \frac{1}{\cos \theta}$

$\cot \theta = \frac{1}{\tan \theta}$

When $\sin \theta = 0$

When $\cos \theta = 0$

$(-\infty, -1] \cup [1, \infty)$

$(-\infty, -1] \cup [1, \infty)$

$\csc^2 \theta = 1 + \cot^2 \theta$

$\sec^2 \theta = 1 + \tan^2 \theta$

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