hahahaLOLOMGosh damn! The question asked for it's derivative.
Yet another derp moment for me within the last hour.
well you sure like colours LOL. the post and your signature!hahaha
my answer was [e^(-x)(cosx-sinx)] / [2(e^(-x)sinx)^1/2]
HAHA!well you sure like colours LOL. the post and your signature!