यदि $f:R \to R$ और $g:R \to R$ एकैकी (one-to-one),वास्तविक मान वाले फलन हैं,तो समाकल $\int_{-\pi}^{\pi} [f(x) + f(-x)][g(x) - g(-x)] \, dx$ का मान क्या है?

  • A
    $0$
  • B
    $\frac{8}{3}$
  • C
    $1$
  • D
    इनमें से कोई नहीं

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समाकल $\int_{0}^{\pi}|\sin 2x| dx$ का मान है

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