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

I have three separate equations that I would really appreciate your help on.

2. Relevant equations

The first is (lnx)^2 dx

The Second is e^x sin(3x) dx

The third is a definitive integral between pi and zero, sin^3(x) dx

3. The attempt at a solution

I am unsure as to how to go about the second two, but would the first go something like

lnx=u

x=e^y

dx=e^u du

Integration comes quite badly to me. I would appreciate a step by step to see what I am actually meant to be doing.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Integration Help

**Physics Forums | Science Articles, Homework Help, Discussion**