The range of f(x) = sin⁻¹x + cos⁻¹x is:

The range of f(x) = sin⁻¹x + cos⁻¹x is:

• A. [−π/2, π/2]
• B. [0, π]
• C. {π/2}
• D. [−π, π]

Answer: C) {π/2}

Explanation: For any x ∈ [−1, 1], sin⁻¹x + cos⁻¹x = π/2. Since the domain of both functions is [−1, 1], the range of their sum is the single value π/2, i.e., {π/2}.