solve

sqrt3cosxtanx+cosx where 0 less than or equal to x less than 2pi

and

cos2x-3sinx=2 where -pi is less than or equal to x less than or equal to pi

exactly.

what I tried was

sqrt3cosx*sinx/cosx+cosx=0

sqrt3sinx+cosx=0

then I made each of them equal to 0

sinx=0/sqrt3

and

cosx=0

But that gives me the wrong answer

And for the other one I tried a similar thing but I couldnt figure it out....

thanks/