કિંમત શોધો: $\tan^{-1} \left( \frac{a - b}{1 + ab} \right) + \tan^{-1} \left( \frac{b - c}{1 + bc} \right)$

  • A
    $\tan^{-1} a - \tan^{-1} b$
  • B
    $\tan^{-1} a - \tan^{-1} c$
  • C
    $\tan^{-1} b - \tan^{-1} c$
  • D
    $\tan^{-1} c - \tan^{-1} a$

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જો $a=\sin ^{-1}(\sin (5))$ અને $b=\cos ^{-1}(\cos (5))$ હોય,તો $a^2+b^2$ ની કિંમત શોધો.

$S = \tan^{-1}\left( \frac{1}{n^2 + n + 1} \right) + \tan^{-1}\left( \frac{1}{n^2 + 3n + 3} \right) + \dots + \tan^{-1}\left( \frac{1}{1 + (n + 19)(n + 20)} \right)$ હોય,તો $\tan S$ ની કિંમત શોધો.

જો $\sin ^{-1}\left(\frac{3}{5}\right)+\cos ^{-1}\left(\frac{12}{13}\right)=\sin ^{-1} \alpha$ હોય,તો $\alpha=$

જો $\cos^{-1} p + \cos^{-1} q + \cos^{-1} r = \pi$ હોય,તો $p^2 + q^2 + r^2 + 2pqr = $

જો ${({\tan ^{ - 1}}x)^2} + {({\cot ^{ - 1}}x)^2} = \frac{{5{\pi ^2}}}{8}$ હોય,તો $x$ ની કિંમત શોધો.

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