- #1
subwaybusker
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Homework Statement
integral: sqrt(x^2+1)
Homework Equations
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.