$\cos \left(\cos ^{-1} \frac{1}{3}+\cos ^{-1} \frac{1}{5}\right)+\cos \left(\sin ^{-1} \frac{1}{3}+\sin ^{-1} \frac{1}{5}\right) =$ . . . . . . .

  • A
    $0$
  • B
    $\frac{\pi}{2}$
  • C
    $\pi$
  • D
    $\frac{\pi}{4}$

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Similar Questions

$x \in [-1, 1]$ માટે $(\sin^{-1} x)^2 + (\cos^{-1} x)^2$ ની ન્યૂનતમ કિંમત છે:

જો $\tan ^{-1} 2 x+\tan ^{-1} 3 x=\frac{\pi}{4}$ હોય,તો $x$ ની કિંમત શોધો.

જો $\tan^{-1} (x+ 2)+ \tan^{- 1}( x -2)= \tan^{-1} (\frac{1}{2})$ હોય,તો $x$ ની કિંમત(ઓ)નો સરવાળો કેટલો થાય?

જો $\cot ^{-1}(\sqrt{\cos \alpha})-\tan ^{-1}(\sqrt{\cos \alpha})=x$ હોય,તો $\sin x$ ની કિંમત શોધો.

કિંમત શોધો: $\cot ^{ - 1}\left(\frac{xy + 1}{x - y}\right) + \cot ^{ - 1}\left(\frac{yz + 1}{y - z}\right) + \cot ^{ - 1}\left(\frac{zx + 1}{z - x}\right)$

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