Write the maximum values of 12 sin x – 9 sin2 x.
f(x)ϵ-(3[-1,1]-2)2+4
f(x)ϵ-([-3,3]-2)2+4
f(x)ϵ-([-5,1])2+4
f(x)ϵ-[0,25]+4
f(x)ϵ[-25,0]+4
f(x)ϵ[-21,4]