Inverse Trigonometric Functions
Xam Idea
CBSE
Grade 12
Question:
If $\cos^{-1} x = y$, then:
(a) $0 \le y \le \pi$
(b) $-\pi/2 \le y \le \pi/2$
(c) $0 < y < \pi$
(d) $-\pi/2 < y < \pi/2$
Step-by-Step Solution
Key Concept: Range of cos^{-1} x is [0, \pi].
The detailed step-by-step mathematical proof is available inside the Mathbee app workspace.
Correct Answer: $0 \le y \le \pi$
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