intergraldari3cosdalamkurung4xditambah3dx

Integral Fungsi Trigonometri.

∫ 3 cos (4x + 3) dx
u = 4x + 3
du / dx = 4 → dx = du / 4
= 3/4 ∫ cos u du
= 3/4 sin u + C
= 3/4 sin (4x + 3) + C