integral dari 4 cos^2 3x dx
Matematika
tom30
Pertanyaan
integral dari 4 cos^2 3x dx
1 Jawaban
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1. Jawaban Anonyme
cos 6x = 2cos² 3x - 1
2cos² 3x = cos 6x + 1
Int 4 cos² 3x dx
= 2 Int (1 + cos 6x) dx
= 2(Int dx + (1/6) Int dsin 6x)
= 2(x + (1/6)sin 6x) + C
= 2x + (1/3)sin 6x + C