Integeral: Trig Substitution help
I have this equation
So I refer to a triangle and use these values for substitution.
http://www.codecogs.com/eq.latex?%5C...x%5E%7B2%7D%7D = 5 cos(x)
x = 5 sin(x)
dx = 5 sin(x) = 5 cos(x)
I ended up having something like this.
I canceled the 5 sin(x)s leaving me with
integral(5 cos x) = - 5 sin x + c
I looked at the triangles and got back.
x/5 + c
Then I looked back at the book for answers and I was way way way off.
What did I do that was totally wrong?