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AP EAMCET · Maths · Continuity and Differentiability

The function \(y=\sin ^{-1}(\cos x)\) is not differentiable at ____

  1. A \(\pi\) only
  2. B \(2 \pi\) only
  3. C \(-2 \pi\) only
  4. D All options are correct
Verified Solution

Answer & Solution

Correct Answer

(D) All options are correct

Step-by-step Solution

Detailed explanation

Domain for \(\sin ^{-1} x\) is, \(x \in(-1,1)\) both values -1 and 1 are excluded Now, \(\cos \pi=-1\) and \(\cos 2 \pi=1\) Also, \(\cos -2 \pi=1\) Hence, \(\sin ^{-1}(\cos x)\) is non differentiable at \(\pi, 2 \pi\) and \(-2 \pi\).