If f(x) = 2 sin3x + C, where C > 0 , then the maximum value of f(x) is:?

If f(x) = 2 sin3x + C, where C %26gt; 0 , then the maximum value of f(x) is:





C


C + 2


C + 3


C + 6











help?

If f(x) = 2 sin3x + C, where C %26gt; 0 , then the maximum value of f(x) is:?
Recall that Sin(x) can not be any bigger than 1. Hence, 2sin(3x) can be no bigger than 2. Since C %26gt; 0, the maximum value is C+2