જો $\cot^{-1}[(\cos \alpha)^{1/2}] - \tan^{-1}[(\cos \alpha)^{1/2}] = x$ હોય,તો $\sin x = $

  • A
    $\tan^2(\frac{\alpha}{2})$
  • B
    $\cot^2(\frac{\alpha}{2})$
  • C
    $\tan \alpha$
  • D
    $\cot(\frac{\alpha}{2})$

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જો $k \le \sin^{-1}x + \cos^{-1}x + \tan^{-1}x \le K$ હોય,તો

જો $(\sin ^{-1} x)^{2}-(\cos ^{-1} x)^{2}=a ; 0 < x < 1, a \neq 0$ હોય,તો $2 x^{2}-1$ ની કિંમત શું થાય?

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