Good afternoon all,

I am looking at what I hope is my last trig substitution question:

Through completing the square I have:

My chosen substitution is:

and

Using this substitution I get:

For the new terminals of integration I get:

Subbing into the origanl integral:

from to

Resulting in:

Checking with my calculator shows that I should have come to:

My suspicion is that I mishandled the 1 in the denominator. Am I correct in this thinking?