Question

Integral dari ⌠cos²x dx=

Answer 1

int cos^2 x dx
= int (1+ cos 2x)/2 dx
= 1/2 int (1+ cos 2x) dx
= 1/2 ( x + 1/2 sin 2x) + c
= 1/2 x + 1/4 sin 2x + c