Occasionally, a solution is missing. Where is the tab to submit one?
Place this in the missing "Submit Solution" tab -
This is what we have for problem #14:
Substitution List:
x = tanθ
dx = sec2θ dθ
√(1+x2 ) = secθ

=

Trig. Sub.
=

Cancel and apply Rule 2, p. 537 (Tangent is odd & +ive)
=

Integrate.
=

Back Substitute.
This should be the answer.
If I'm wrong, fix me!
Thanks.