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

integral: sqrt(x^2+1)

2. Relevant equations

3. The attempt at a solution

I tried using x=tan[y], dx=sec^2[y]dy

Integral:

sqrt(tan^2[y]+1)sec^2[y]dy

=sec^3[y]dy

=(tan^2[y]+1)(sec[y])dy

=(tan^2[y]sec[y]+sec[y])dy

and then i was stuck.

**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!

# Homework Help: Integral: sqrt(a^2+x^2)

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