00:02
So i have a triangle and i'm going to label it abc.
00:05
I don't even know if this is a real triangle at this point, but i just want a place to record the measures.
00:11
So a is 43 .9 degrees.
00:22
And then side a is 8 .6.
00:27
Side b is 10 .9.
00:29
So i'm going to start off using law of signs to find angle b.
00:34
I don't have any options here.
00:39
So sign of a over side a equals sign of b over 10 .9.
00:45
Cross multiply and divide both sides by 8 .6.
00:57
Let's get a value for sign of b.
01:01
So make sure your calculators in degree mode, sign of 43 .9 times 10 .9.
01:09
Divided by 8 .6.
01:12
It gives you .8788.
01:16
Use the inverse function to get that angle measure in degrees.
01:23
So second sign .8788 is going to give me 61 .5 degrees.
01:36
Or i have to consider the angle that uses it as a separate.
01:41
Supplement and that would be a hundred and eighteen point five degrees both of these fit so i'm going to have two triangles i'm going to draw a separate triangle over here and i'm going to label it just the same as i did the first one i'm going to put in my 43 .9 my 8 .6 and my 10 .9 so you want to pick your choice, multiple choices, going to wind up being b...