integral cos^2 3x . sin^4 3x dx

Answer 1

In google type :

wolframapha widget "Step-by-step integration"

When yoe see list of results click on :

WolfrAlpha Widget "Step-by-step integration"

When page be open in rectangle type :

cos^2(3x)sin^4(3x)

(type exactly like that)

and click option : Submit

When you see result click option :

Step-by-step solution

Answer 2

Cos^2 (3x)sin^4(3x)dx