MCQ
यदि $\tan ^{-1}(1+x)+\tan ^{-1}(1-x)=\frac{\pi}{2}$, तब $x=$ ?
  • A
    1
  • B
    -1
  • $0$
  • D
    $\frac{1}{2}$

Answer

Correct option: C.
$0$
C

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