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Inverse Trigonometric Functions

Oswaal

CBSE

Grade 12

Question:

The principal value of $\csc^{-1}(-2)$ is:
(a) $-\pi/6$
(b) $5\pi/6$
(c) $\pi/6$
(d) $-5\pi/6$

Step-by-Step Solution

Key Concept: csc^{-1}(-2) = sin^{-1}(-1/2) = -\pi/6.

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Correct Answer: $-\pi/6$

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