यदि रैखिक फलन $f(x)$ और $g(x)$,$\int {\left[ {\left( {1 - 2x} \right)\cos x + \left( {3 + 2x} \right)\sin x} \right]} dx = f(x)\sin x + g(x)\cos x + C$ (जहाँ $C$ समाकलन स्थिरांक है) को संतुष्ट करते हैं,तो निम्नलिखित में से कौन सा सत्य है?

  • A
    $f(x) = 3 - 2x$
  • B
    $g(x) = 5 - 2x$
  • C
    $f(x) = 3 + 2x$
  • D
    $g(x) = -5 + 2x$

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