(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I need to find the integral of (e^3x)cos(2x)

2. Relevant equations

3. 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). Im 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.

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# I got two problems

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