$m \neq n$ $(m, n \in I)$ के लिए समाकल $\int_{-\pi}^{\pi} \sin(mx) \sin(nx) \, dx$ का मान क्या है?

  • A
    $0$
  • B
    $\pi$
  • C
    $\frac{\pi}{2}$
  • D
    $2\pi$

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$e^{\int_0^{\pi / 2} \sqrt{\frac{1-\sin 2 x}{1+\sin 2 x}} d x}=$

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