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

Integral: Upper limit is pie/3, lower limit is 0. secxtanx(square root of 1+secx)dx

Sorry if this is confusing, I dont know how to use the real math symbols.

3. The attempt at a solution

I realized it is U-substitution and not the FTC.

u=1+secx dx=sextanx du

when x=0, u=2 & x=pie/3, u=3.

I dont really know what to do after that, I'm a total noob at u-sub. Please help.

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

Dismiss Notice

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!

# Evaluating Integral

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