MCQ
$\sin \left[\tan ^{-1} \frac{1-x^2}{2 x}+\cos ^{-1} \frac{1-x^2}{1+x^2}\right]=$
  • A
    $0$
  • 1
  • C
    $\frac{1}{\sqrt{2}}$
  • D
    $\sqrt{2}$

Answer

Correct option: B.
1
B

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