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Integrating sin^2 x via (1 - cos 2x)/2 gives:
Ax/2 - (sin 2x)/4
Bx/2 + (sin 2x)/4
C(sin^3 x)/3
D-(cos 2x)/2
Answer & Solution
Correct answer: A. x/2 - (sin 2x)/4
Use sin^2 x = (1 - cos 2x)/2, which integrates to x/2 - (sin 2x)/4.
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