1+2sin2x-4cos^2x=0 помогите

1+4 * sinx * cosx + 2cos^2x=0sin^2x+ cos^2x + 4*sinx*cosx + 2 cos^2x=0sin^2x +4*sinx*cosx + 3cos^2x=0 |:cos^2xtg^2x + 4tgx +3 = 0tgx = tt^2 +4T+3=0t1=0t2=-4x=Пk ; kЭ Zx= arctg4 +Пk ; KЭZ