Question

Question #66116

Answer 1

`"A"(x)=1/3sin3x-1/3sqrt3cos3x+"c"`

Explanation:

Recall that `intcos(ax)` `dx=1/asinx` and `intsin(ax)` `dx=-1/acosx`.

`intcos3x+sqrt3sin3x` `dx=intcos3x` `dx+sqrt3intsin3x` `dx=`
`1/3sin3x-1/3sqrt3cos3x+"c"`