I'm having trouble figuring out the substitution for .
I tried and , but those don't seem to lead me anywhere.
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I assume you mean this:
Use the old single term in the denominator trick. is a lot easier to work with.
What about ?
Originally Posted by diablo2121 What about ? This fits a pattern. Look at it as:
That fits the pattern for arctan, so:
u = x^2
du = 2xdx
a = 1
You have to accomodate for the 2 in 2xdx, so:
therefore, the basic integral is:
So from there on it is plugging in numbers! You have to learn these patterns so read up!
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