यदि $(\tan ^{-1} x)^2+(\cot ^{-1} x)^2=\frac{5 \pi^2}{8}$ है,तो $x^2+1=$

  • A
    $-1$
  • B
    $2$
  • C
    $1$
  • D
    $-2$

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यदि ${x_1}, {x_2}, {x_3}, {x_4}$ समीकरण ${x^4} - {x^3}\sin 2\beta + {x^2}\cos 2\beta - x\cos \beta - \sin \beta = 0$ के मूल हैं,तो ${\tan ^{ - 1}}{x_1} + {\tan ^{ - 1}}{x_2} + {\tan ^{ - 1}}{x_3} + {\tan ^{ - 1}}{x_4} = $

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$2 \pi - \left(\sin ^{-1} \frac{4}{5} + \sin ^{-1} \frac{5}{13} + \sin ^{-1} \frac{16}{65}\right)$ का मान ज्ञात कीजिए।

यदि $\cos ^{-1} x+\cos ^{-1} y+\cos ^{-1} z=3 \pi$ है,तो $x^{2025}+x^{2026}+x^{2027}$ का मान क्या है?

$\tan \left(\cos ^{-1}\left(\frac{4}{5}\right)+\tan ^{-1}\left(\frac{2}{3}\right)\right)$ का मान है

$\tan \left\{\frac{1}{2} \cos ^{-1} \frac{\sqrt{5}}{3}\right\}$ का मान है

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