cos^2 x*tg^2 x+cos2x=sinx+1

cos^2x*tg^2x+cos2x=sinx+1\\sin^2x+cos^2x-sin^2x-sinx-1=0\\1-sin^2x-sinx-1=0|*(-1)\\sin^2x+sinx=0\\sinx(sinx+1)=0\\\\sinx=0\\x=\pi n, \; n\in Z;\\\\sinx+1=0\\sinx=-1\\x=\frac{\pi}{2}+2\pi n, \; n\in Z.