Problem:
So I am kind of stumped with these Us in the equation. Our professor has been gracious enough to point us to an integral solving site, but I get different answers based on switching U for X.
I don't think I need to switch any of the variables out, but I am trying to figure out where I want to go from here. It doesn't seem like I should use the substitution method on this, but I could be wrong. Could someone walk me through this?
On this site (Wolfram Mathematica Online Integrator) it says the answer should be:
I know from the trig identities that sin/cos = tan and that would then leave 1/cos which is sec. My only gripe with their answer is that X that is upfront. Do you know how that is calculated?
No offense but I think you used it incorrectly.
First where did the x come from? There are no x's in the original and you are not integrating with respect to x, but with respect to u.
You can check that the answer I gave you is correct by taking its derviative.
The last step comes from multiplying the top and bottom of the fraction by