MCQ
यदि $x \neq 0$ तब $\cos \left(\tan ^{-1} x+\cot ^{-1} x\right)=?$
  • A
    -1
  • B
    1
  • $0$
  • D
    इनमें से कोई नहीं

Answer

Correct option: C.
$0$
C

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