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Using the half-angle identity, the antiderivative of sin^2 x is

Ax/2 + sin 2x/4 + C
Bsin^3 x/3 + C
Cx/2 - sin 2x/4 + C
D-cos^3 x/3 + C
Answer & Solution
Correct answer: C. x/2 - sin 2x/4 + C
Using sin^2 x = (1 - cos 2x)/2 gives x/2 - sin 2x/4.
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