00:01
There's a right angle triangle where c is the right angle.
00:04
So this is going to be, it's a triangle a, b, c.
00:06
So this is going to be a, that's going to be b, and this is going to be c.
00:10
And that it tells us that b, the opposite side is 8 and c, which is the hypotenuse of 17.
00:16
The other side, so i'm going to call that little a.
00:20
And i'm going to find that first because that's a pythagorean theorem.
00:24
So i'm going to go 17 squared minus 8 squared, square rooted.
00:29
Okay.
00:30
And i'm going to get, if you don't know 17 squared, get it on your calculator, and if you don't know 8 squared, same thing, but this is 289 minus 64, which gives you 225, and that's 15, so a is 15.
00:49
And then it asks me to find the angle, so i'm going to find a first, so sign a is 15 over 17, because this is the opposite, and this is the hypotenuse.
01:01
You don't have to use that side.
01:02
You can use cosine as well...