Question

cos^2(x)+6sin(x)-6=0

Answer 1

$cos^2(x)+6sin(x)-6=0\ 1-sin^2(x)+6sin(x)-6=0\ sin^2(x)-6sin(x)+5=0\ (sin x -5)(sin x - 1) = 0\ sin x = 1\ x = 2pi k +frac{pi}{2}$