What is the third non-zero term of the Taylor series for f(x)=cos(x)f(x) = \cos(x)f(x)=cos(x) centered at a=0a=0a=0?
x424\frac{x^4}{24}24x4
x44\frac{x^4}{4}4x4
x6720\frac{x^6}{720}720x6
−x424-\frac{x^4}{24}−24x4