$x \in [-1, 1]$ के लिए $(\sin^{-1} x)^2 + (\cos^{-1} x)^2$ का न्यूनतम मान है:

  • A
    $\frac{\pi^2}{8}$
  • B
    $\frac{3\pi^2}{8}$
  • C
    $\frac{5\pi^2}{8}$
  • D
    $\frac{7\pi^2}{8}$

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