જો $\sin^{-1} x + \sin^{-1} y = \pi/2$ હોય, તો $x^2$ કોના બરાબર છે?

  • A
    $1 - y^2$
  • B
    $1 + y^2$
  • C
    $\sqrt{1 - y^2}$
  • D
    $\sqrt{1 + y^2}$

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