નિરીક્ષણની રીત દ્વારા વિધેય $\sin 2x$ નું પ્રતિ-વિકલિત (અથવા સંકલિત) શોધો.

  • A
    $-\frac{1}{2} \cos 2x$
  • B
    $\frac{1}{2} \cos 2x$
  • C
    $-\cos 2x$
  • D
    $\cos 2x$

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