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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