What is the coefficient of x3x^3x3 in the Maclaurin series of f(x)=cos(x)sin(x)f(x) = \cos(x) \sin(x)f(x)=cos(x)sin(x)?
−1/3-1/3−1/3
2/32/32/3
−2/3-2/3−2/3
1/31/31/3