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Verified answer
Jawabintegral
∫ 3 cos 5x sin 5x dx = 3/2 ∫ 2 sin 5x cos 5x
= 3/2 ∫ sin 10 x dx
= 3/2 (1/10) (- cos 10 x) + c
= - 3/20 cos 10x + c