The range of f(x) = cos⁻¹(x) + π/2 is:
The range of f(x) = cos⁻¹(x) + π/2 is:
- A. [0, π]
- B. [-π/2, π/2]
- C. [π/2, 3π/2]
- D. [0, 3π/2]
Answer: C) [π/2, 3π/2]
Explanation: The range of cos⁻¹(x) is [0, π]. Adding π/2 to all values yields [π/2, 3π/2].
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