1. The problem statement, all variables and given/known data I am asked to prove the following statement is correct integral (sqrt(a^2+x^2))/x dx = sqrt(a^2+x^2)-a log(a (sqrt(a^2+x^2)+a))+ C 2. Relevant equations x = atanθ dx = (asecθ)^2 tan^2+1 = sec^2 3. The attempt at a solution got down to a (sec^2 θ a(√sec^2)dθ)/atanθ I plugged into wolfram and immediately got something involving csc in the steps and im not sure where it came from. Just beginning these trig substitutions in class.