Which function is represented by ∑n=0∞(−1)nx2n+1(2n+1)!\displaystyle\sum_{n=0}^{\infty}\frac{(-1)^n x^{2n+1}}{(2n+1)!}n=0∑∞(2n+1)!(−1)nx2n+1?
sinx\sin xsinx
cosx\cos xcosx
arctanx\arctan xarctanx
exe^xex