$\cos^{-1}\left(\frac{15}{17}\right) + 2\tan^{-1}\left(\frac{1}{5}\right) = $

  • A
    $\frac{\pi}{2}$
  • B
    $\cos^{-1}\left(\frac{171}{221}\right)$
  • C
    $\frac{\pi}{4}$
  • D
    આમાંથી કોઈ નહીં

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સમીકરણ $\sin^{-1}x - \cos^{-1}x = \cos^{-1}\left(\frac{\sqrt{3}}{2}\right)$ માટે

$2 \cos ^{-1} x = \sin ^{-1} \left( 2 x \sqrt{1 - x^2} \right)$ એ $x$ ની કઈ કિંમતો માટે સાચું છે?

$\tan \left(\frac{\pi}{4}+\frac{1}{2} \cos ^{-1}\left(\frac{a}{b}\right)\right)+\tan \left(\frac{\pi}{4}-\frac{1}{2} \cos ^{-1}\left(\frac{a}{b}\right)\right)$ ની કિંમત શોધો.

જો $\tan ^{-1} 2 x+\tan ^{-1} 3 x=\frac{\pi}{4}$ હોય,તો $x$ ની કિંમત શોધો.

${(\sin ^{ - 1}}x)^3 + {(\cos ^{ - 1}}x)^3$ ની મહત્તમ અને ન્યૂનતમ કિંમત શોધો.

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