5 sin x^2+6 cos x-6=0

Question

5 sin x^2+6 cos x-6=0

Answer 1

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

5*(cos(x))^2-6*cos(x)+1=0

(5*cos(x)-1)*(cos(x)-1)=0

cos(x1)=0,2; cos(x2)=1