→Higher derivative at zero
This gives an explicit expression for the even order derivatives. The odd order derivatives (first derivative, third derivative, etc.) are zero because the function is an even function.
The first few
derivatives (starting from the zeroth) are:
, 0 , -1/3 , 0 , 1/5 , 0 , -1/7 , 0 , 1/9 , \dots</math>