AM-2537

Basic trigonometric identities

A Math · Secondary 4 · Easy · Basic trigonometric identities

Prove the identity

\csc^2 x - \cot^2 x = 1

.

Identity is true for all $x$ where $\sin x \neq 0$ .
Identity is false because left side simplifies to $\tan^2 x$ .
Identity is false because left side simplifies to $0$ .
Identity is true only when $x=0$ .

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