00:01
The one on the left, we're using all cosines to solve for side a.
00:05
So the way that we set this up here is the unknown piece here is the a squared.
00:09
So we're going to do 9 squared plus 7 squared minus 2 times 9 times 7 and then cosine the angle, so cosine of 35 degrees.
00:19
Now when you go about putting these into your calculator, you do want to make sure that you are in degree mode as you're working with a triangle here and you're given degrees.
00:27
So essentially i'm going to do 81 plus 49, and i'm multiplied to minus 2 times 9 times 7.
00:34
And i'm going to ahead and put the whole thing in and cosine of 35.
00:37
So i have a squared is about 26 .7868.
00:43
My last step here is to take the square root of that number.
00:46
So my a value here is 5.
00:49
It says nearest 10th, so it would be 5 .2.
00:52
For the one on the right, very similar, but now we're going to be finding an angle...