$\cos \left[\cos ^{-1}\left(-\frac{1}{7}\right)+\sin ^{-1}\left(-\frac{1}{7}\right)\right]$ ની કિંમત શોધો.

  • A
    $-\frac{1}{3}$
  • B
    $0$
  • C
    $\frac{1}{3}$
  • D
    $\frac{4}{9}$

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Similar Questions

$\cos \left(\sin ^{-1} \frac{3}{5}+\sin ^{-1} \frac{5}{13}+\sin ^{-1} \frac{33}{65}\right) = . . . . .$

$\cos ^{-1}\left[\frac{1}{\sqrt{2}}\left(\cos \frac{9 \pi}{10}-\sin \frac{9 \pi}{10}\right)\right]$ નું મુખ્ય મૂલ્ય શોધો.

પદાવલિ $ \tan \left(\frac{1}{2} \cos ^{-1} \frac{2}{\sqrt{5}}\right) $ ની કિંમત શોધો.

જો $\cos ^{-1} x+\cos ^{-1} y+\cos ^{-1} z=\pi$ અને $x^2+y^2+z^2+k x y z=1$ હોય,તો $k$ ની કિંમત શોધો.

જો $0 < x < 1$ હોય,તો $\cot ^{-1}\left( \frac{2x^2 - 1}{2x\sqrt{1 - x^2}} \right)$ ની કિંમત શોધો.

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