यदि $\sin ^{-1} a=\alpha+\beta$ और $\sin ^{-1} b=\alpha-\beta$ है,तो $\sin ^2 \alpha+\cos ^2 \beta=$ . . . . . . .

  • A
    $a b-1$
  • B
    $1-a b$
  • C
    $1+a b$
  • D
    $a b$

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यदि ${\tan ^{ - 1}}\frac{{1 - x}}{{1 + x}} = \frac{1}{2}{\tan ^{ - 1}}x$ है,तो $x = $

यदि $\sin ^{-1} x+\sin ^{-1} y+\sin ^{-1} z=\frac{3 \pi}{2}$ है, तो $x^{9}+y^{9}+z^{9}-\frac{1}{x^{9} y^{9} z^{9}}$ का मान क्या होगा?

$\sin \left[ \frac{\pi }{2} - \sin^{-1} \left( -\frac{\sqrt{3}}{2} \right) \right] = $

$\sin(\cot^{-1}(\tan(\cos^{-1}x)))$ का मान किसके बराबर है?

$\frac{1}{2}{\cos ^{ - 1}}\left( {\frac{{1 - x}}{{1 + x}}} \right) = $

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