$\cos ^{-1}\left\{\cot \left(\sum_{i=1}^3 \cot ^{-1} i\right)\right\}=$ . . . . . . .

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

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Similar Questions

પ્રતિ-ત્રિકોણમિતીય વિધેયોના મુખ્ય મૂલ્યોને ધ્યાનમાં લેતા,$\frac{3}{2} \cos ^{-1} \sqrt{\frac{2}{2+\pi^2}}+\frac{1}{4} \sin ^{-1} \frac{2 \sqrt{2} \pi}{2+\pi^2}+\tan ^{-1} \frac{\sqrt{2}}{\pi}$ નું મૂલ્ય શોધો.

સાબિત કરો કે $\tan ^{-1}\left(\frac{2}{11}\right)+\tan ^{-1}\left(\frac{7}{24}\right)=\tan ^{-1}\left(\frac{1}{2}\right)$

સાબિત કરો કે $\cos ^{-1} \frac{4}{5} + \cos ^{-1} \frac{12}{13} = \cos ^{-1} \frac{33}{65}$

સમીકરણ $2\cos^{-1}x + \sin^{-1}x = \frac{11\pi}{6}$ ને

જો $a > b > 0$ અને $\sec^{-1} \left( \frac{a+b}{a-b} \right) = 2 \sin^{-1} x$ હોય,તો $x$ ની કિંમત શોધો.

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