JEE Mathematics · Hard

Differentiability: JEE Main MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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JEE MainHardQuestion 360009

Question

The derivative of sin⁻¹x is:
  1. A
    1/√(1−x²)
    Correct
  2. B
    1/(1+x²)
  3. C
    −1/√(1−x²)
  4. D
    √(1−x²)

Correct answer

1/√(1−x²)

Explanation

d/dx(sin⁻¹x) = 1/√(1−x²) for |x| < 1. Similarly d/dx(cos⁻¹x) = −1/√(1−x²) and d/dx(tan⁻¹x) = 1/(1+x²).