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Antiderivatives and Indefinite Integrals

AP Calculus AB· difficulty 2/5

Which is a correct antiderivative of f(x)=cos⁡(2x)f(x) = \cos(2x)?

  • A

    2sin⁡(2x)2\sin(2x)

  • B

    −sin⁡(2x)/2-\sin(2x)/2

  • C

    sin⁡(2x)/2\sin(2x)/2

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  • D

    −2sin⁡(2x)-2\sin(2x)

Explanation

Differentiate sin⁡(2x)/2\sin(2x)/2: cos⁡(2x)\cos(2x).

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