(2sin(x))/(cos(x)-sin(x)) (2cos^(2)x)/(cos(2x))-(sin(2x 2))/(cos(2x))=0

Please verify the equation - what I think you wrote is this:



II'm pretty sure the sin(2x+2) is not right. And perhaps there should be a + sign between the first and second terms? But even with these changes the equation doesn't work.