यदि $4\sin^{-1}x + \cos^{-1}x = \pi$ है,तो $x$ का मान ज्ञात कीजिए।

  • A
    $0$
  • B
    $\frac{1}{2}$
  • C
    $-\frac{\sqrt{3}}{2}$
  • D
    $\frac{1}{\sqrt{2}}$

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यदि $\sin^{-1}(1 - x) - 2\sin^{-1}x = \pi/2$ है,तो $x$ का मान ज्ञात कीजिए:

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सिद्ध कीजिए कि $3 \sin ^{-1} x = \sin ^{-1}(3 x - 4 x^{3})$,जहाँ $x \in [-\frac{1}{2}, \frac{1}{2}]$.

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