How to I solve this? sinx = cos3x? (1 Viewer)

[blackops23]

How do I solve sinx=cos 3x for 0(<)x(<)2pi

I tried splitting cos3x into cos(2x + x) but that just didn't do anything.

Anyways, thanks.

 

[hscishard]

Splitting it should work. I got an equation with only sinx
nvm...i used the sin expansion instead of the cos one

ok.. you're gonna have to solve it the general solutions way.
sinx = sin(90-3x)

 

[blackops23]

Oh i see, geez that question was pretty easy, thanks