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`int sin 3x sin 2x dx = ?`A. `- 1/5 cos 5x + C`B. `1/2 sin x + 1/10 sin 5x - C`C. `1/2 sinx - 1/10 sin 5x - C`D. `-1/3 cos 3 x - 1/2 sin 2 x + C`

Answer» Correct Answer - C
`I = 1/2 int2sin 3xsin2x dx`
`= 1/2(cosx -cos5x) dx = 1/2 sin x - 1/10sin 5x + C`.


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