1. ## Trig Equations

cos^2x-2sinxcosx-sin^2x=0 , 0<2x<pi

Thanks and happy new year!

2. Originally Posted by Tiger
cos^2x-2sinxcosx-sin^2x=0 , 0<2x<pi

Thanks and happy new year!
note the following identities that may help solve this equation ...

$\cos^2{x} - \sin^2{x} = \cos(2x)$

$2\sin{x}\cos{x} = \sin(2x)$