જો $\tan^{-1} x + \tan^{-1} y = \frac{\pi}{4}$ હોય,તો:

  • A
    $x + y - xy = 1$
  • B
    $x + y + xy = 1$
  • C
    $x + y + xy + 1 = 0$
  • D
    $x + y - xy + 1 = 0$

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Similar Questions

$2 \cot ^{-1} \frac{1}{2} - \cot ^{-1} \frac{4}{3}$ ની કિંમત શોધો.

જો $\sin ^{-1}\left(\frac{12}{x}\right)+\sin ^{-1}\left(\frac{5}{x}\right)=\frac{\pi}{2}$ હોય, તો $x=$

$\tan \left[ 2\tan^{-1}\left( \frac{1}{5} \right) - \frac{\pi}{4} \right] = $

$\cos \left(\tan ^{-1}\left(\sin \left(\cot ^{-1} x\right)\right)\right)$ નું મૂલ્ય શું છે?

નીચેના વિધાનો ધ્યાનમાં લો:
વિધાન $(A)$: જ્યારે $x, y, z$ ધન સંખ્યાઓ હોય, ત્યારે $\operatorname{Tan}^{-1}\left(\sqrt{\frac{x(x+y+z)}{y z}}\right)+\operatorname{Tan}^{-1}\left(\sqrt{\frac{y(x+y+z)}{x z}}\right)+\operatorname{Tan}^{-1}\left(\sqrt{\frac{z(x+y+z)}{x y}}\right) = \pi$
કારણ $(R)$: $\operatorname{Tan}^{-1} a + \operatorname{Tan}^{-1} b = \operatorname{Tan}^{-1}\left(\frac{a+b}{1-ab}\right)$ જો $a > 0$ અને $b > 0$ અને $ab < 1$ હોય.

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