Find the range of f(x)=cos2(x)−6sin(x)+4f(x) = \cos^2(x) - 6\sin(x) + 4f(x)=cos2(x)−6sin(x)+4.
[−1,11][-1, 11][−1,11]
[−1,9][-1, 9][−1,9]
[0,11][0, 11][0,11]
[1,9][1, 9][1,9]