Question

what is integral of sin 3x

Answer 1

the answer is.... -cos3x/3

Answer 2

The answer is−cos3x3+C

Explanation:

The integral of sinθ is −cosθ
You can use the substitution, u=3x the du=3dx
∫sin3xdx=∫sinudu3=−cosu3=−cos3x3+

C