- #1
Gundam44
- 7
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Homework Statement
find the following integral:
cos(x/2) - sin(3x/2) dx
Homework Equations
I think the substitution method has to be used.
Solve integrals by parts.
The Attempt at a Solution
Let u = x/2
cosu
du/dx=1/2, I then inverted it so dx/du = 2/1 = 2
So dx=2du
Now I have cosu2du
Do I take out the constant ie: constant multiple rule?
I am not confident about where to go next.
Any help would be vastly appreciated, thank you.
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