જો $2\tan^{-1}(\cos x) = \tan^{-1}(2\csc x)$ હોય,તો $x =$

  • A
    $\frac{3\pi}{4}$
  • B
    $\frac{\pi}{4}$
  • C
    $\frac{\pi}{3}$
  • D
    આમાંથી કોઈ નહીં

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

વિધેયને તેના સૌથી સરળ સ્વરૂપમાં લખો: $\tan ^{-1} \left( \frac{\sqrt{1+x^{2}}-1}{x} \right), x \neq 0$

જો $\sum_{n=1}^k \tan ^{-1}\left(\frac{1}{n^2+3 n+3}\right)=\tan ^{-1} \alpha$ હોય,તો $\alpha=$

$\tan^{-1} \frac{1}{2} + \tan^{-1} \frac{1}{3} = ?$

સમીકરણ $\tan ^{-1}(1+x)+\tan ^{-1}(1-x)=\frac{\pi}{2}$ નો ઉકેલ શોધો.

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