જો $\theta = \cot^{-1}(7) + \cot^{-1}(8) + \cot^{-1}(18)$ હોય,તો $\cot \theta$ ની કિંમત શોધો.

  • A
    $2$
  • B
    $3$
  • C
    $4$
  • D
    $1$

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Similar Questions

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

જો $\tan ^{-1}\left(\frac{x-1}{x-2}\right)+\tan ^{-1}\left(\frac{x+1}{x+2}\right)=\frac{\pi}{4}$ હોય,તો $x$ ની કિંમતો શોધો.

$\tan \frac{1}{2} \left[ \sin^{-1} \frac{2x}{1+x^2} + \cos^{-1} \frac{1-y^2}{1+y^2} \right]$ ની કિંમત શોધો,જ્યાં $|x | < 1, y>0$ અને $xy < 1$ છે.

જો $y = \tan^{-1} \sqrt{\frac{1 + \cos x}{1 - \cos x}}$ હોય,તો $\frac{dy}{dx}$ શું થાય?

$x$ ની સાપેક્ષમાં $\cos^{-1} \left( \sqrt{\frac{1+x}{2}} \right)$ નું વિકલન સહગુણક શું છે?

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