These are some questions I can't solve on a practice test, if anyone can help me it'd be great.
For 1. I'm not sure what to do. Just integrating it normally doesn't seem right.
For 2. I used long division for it and got and have no idea what to do next.
And also this one(should be easier)
for the first one u have
so let and im sure u can get it from there.
for the second one
we use the same idea used in the first one. .
once again we let .
Actually there is a simpler way to get that integral (and a more formal :) ).
Originally Posted by putnam120
You should have memorized that,
Okay, now you complete the square,
Divide through by 16,
Use linear substitution,
Thus, by substitution theorem,
in your last step you mistakenly subed in for
the correct expression is .
and what you did is basically the same think as making the substitution that i suggested, the only difference is that yours does not require any vast knowledge of trigonometry.