Derivatives of the elementary functions.
(C)′=0
(xn)′=nxn−1
(ex)′=ex
(ax)′=axlna,a>0,a=1
(lnx)′=x1,x>0
(logax)′=xlna1,a>0,a=1
(sinx)′=cosx
(cosx)′=−sinx
(tanx)′=cos2x1=1+tan2x,x=2π+πn
(cotx)′=−sin2x1=−(1+cot2x),x=πn
(arctanx)′=−(arccotx)′=1+x21
(∣x∣)′=∣x∣x,x=0