00:01
Ok, we have a tricky substitution, but first let's take care of this thing.
00:06
If you take out 4, so the 4 comes out as 2, so we have 2x on the denominator.
00:18
And then this way, ok, so this is a squared minus x squared, which is the, in this case x is 3 over 2, sine theta.
00:37
So then dx is 3 over 2, cosine theta, d theta.
00:46
And, yeah, put everything in together, so we have dx on top, which is 3 over 2, cosine theta, d theta.
00:57
In the denominator, 2 times x, which is 3 over 2, sine theta, and then this one, 9 over 4, minus 9 over 4, sine squared theta...