JEE Mathematics · Medium

Differentiability: Higher order derivatives MCQ

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

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Higher order derivativesMediumQuestion 360007

Question

If y = sin x, then d²y/dx² is:
  1. A
    −sin x
    Correct
  2. B
    cos x
  3. C
    −cos x
  4. D
    sin x

Correct answer

−sin x

Explanation

y' = cos x. y'' = d/dx(cos x) = −sin x.