જો ${\tan ^{ - 1}}x + {\tan ^{ - 1}}y + {\tan ^{ - 1}}z = \pi ,$ હોય તો $\frac{1}{{xy}} + \frac{1}{{yz}} + \frac{1}{{zx}} = $

  • A
    $0$
  • B
    $1$
  • C
    $\frac{1}{{xyz}}$
  • D
    $xyz$

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Similar Questions

$\frac{d}{dx} \left( \cos^{-1} \sqrt{\frac{1 + \cos x}{2}} \right) = $

સાબિત કરો કે $\tan ^{-1} x+\tan ^{-1} \frac{2 x}{1-x^{2}}=\tan ^{-1}\left(\frac{3 x-x^{3}}{1-3 x^{2}}\right)$,જ્યાં $|x| < \frac{1}{\sqrt{3}}$.

જો $y = \cos^{-1}(\cos x)$ હોય,તો $x = \frac{5\pi}{4}$ આગળ $\frac{dy}{dx}$ શોધો.

પ્રતિ-ત્રિકોણમિતીય વિધેયના મુખ્ય મૂલ્યોને ધ્યાનમાં લેતા,$\tan \left(\cos ^{-1} \frac{1}{5 \sqrt{2}}-\sin ^{-1} \frac{4}{\sqrt{17}}\right)$ નું મૂલ્ય શોધો.

$\tan \left(2 \tan ^{-1}\left(\frac{3}{5}\right)+\sin ^{-1}\left(\frac{5}{13}\right)\right)$ ની કિંમત શોધો:

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