यदि $\cos^{-1} p + \cos^{-1} q + \cos^{-1} r = \pi$ है,तो $p^2 + q^2 + r^2 + 2pqr = $

  • A
    $3$
  • B
    $1$
  • C
    $2$
  • D
    $-1$

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यदि $y = \tan^{-1} \left( \frac{x^{1/3} + a^{1/3}}{1 - x^{1/3}a^{1/3}} \right)$ है,तो $\frac{dy}{dx} = $

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यदि $\cos ^{-1} \sqrt{p}+\cos ^{-1} \sqrt{1-p}+\cos ^{-1} \sqrt{1-q}=\frac{3 \pi}{4}$ है,तो $q$ का मान ज्ञात कीजिए।

यदि $x$ एक गैर-धनात्मक स्वीकार्य मान लेता है,तो $\sin^{-1} x =$

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