 #1
 12
 0
Homework Statement
the question is 3(b) on the attached pdf.
Homework Equations
The Attempt at a Solution
I could only get as far as the filling in the equation.
How do they change it to one integral.?
And also where did they get them substitutions from?
Any help would be greatly appeciated.
Attachments

173.7 KB Views: 266