In my solution book it says Let How do you figure what to use as substitution I'm too lazy to type this out, so here's a picture. In the circled part, how do they get from that trig expression to that?
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for your integration use the sub let ..... as you can see in the attachment the rest for you
Go this website Type in the exact expression: integrate dx/sqrt[x^2 + a^2] Click the equal sign at the end. What do you get? Ckick the show steps button.
I think you misunderstood my question. I asked how =
Originally Posted by chengbin I think you misunderstood my question. I asked how = At the start of the question it states let . Can you work out the part?
Thanks!
OK, how about the first question?
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