QUESTION 3 Evaluate the integral. 3 cost 5x dx ○ 9 X 2x + 2/10 sin 5x + 3 sin 10x + C 160 O 9 3 X + sin 10x + 8 sin 20x + C 32 9 3 8 x+sin 10x+ sin 20x + C 160 O 9 3 sin 5x + sin 20x +C

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