- #1
ludi_srbin
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Homework Statement
I need to find the integral of (e^3x)cos(2x)
Homework Equations
The Attempt at a Solution
I tried using different trig identities for cos(2x) to get a better equation and then tried to do few versions using the integration by parts but they all kept getting more complicated.
Also I need to find cos(sqrt.x). I am not sure how to do the integration by parts since I have only one piece of equation. Just setting X^1/2=u won't work couse du part has x in it which I can't take out of the integral.