જો $2 \tan^{-1}(\cos x) = \tan^{-1}(2 \operatorname{cosec} x)$ હોય,તો $x$ ની કિંમત શોધો.

  • A
    $-\frac{\pi}{4}$
  • B
    $0$
  • C
    $\frac{\pi}{8}$
  • D
    $\frac{\pi}{4}$

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જો $\theta \in \left[-\frac{\pi}{2}, \frac{\pi}{2}\right]$ હોય,તો $\cos^{-1}(\sin \theta)$ બરાબર શું થાય?

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