integral (sin x sin 3x) dx = . . ..
Matematika
rheni
Pertanyaan
integral (sin x sin 3x) dx = . . ..
1 Jawaban
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1. Jawaban dewisugi
intergal (sinxsin3x)dx =integ (sin 3x sin x) dx
= integ (-1/2 (cos 4x-cos 2x)) dx
= integ (-1/2cos 4x +1/2 cos 2x)
= -1/8sin 4x+ 1/4sin2x +c