Jawabanmu

2014-09-02T14:31:19+07:00
1. Integral cos (3x+2) dx
Misal: u= 3×+2, du= 3 dx , dx= du/3 penyelesaian
Int cos u du/3
= 1/3 int cos u
= 1/3 sin u + c
= 1/3 sin 3x+2 + c


2. Int 8 x cosec^2(6x^2-π)
Misal u= 6x^2-π, dx= du/12x
Penyelesaian
=Int 8x cosec^2 u du/12 x
= 8x/12x int cosec^2 u + c
= -2/3 cotan u + c
= -2/3 cotan 6x^2 - π + c