00:03
In this question, we are given the following information and we need to find the missing parts.
00:05
So we already have angle b.
00:08
We need to find side b and side c.
00:11
So that's where law of signs come in.
00:14
So this is a triangle a, b, c.
00:19
We have to find side b.
00:20
We have to find side c.
00:21
Side a is already given to us as 4 .54.
00:25
Angle a is given to us as 41 degrees, 30 minutes.
00:30
And angle b is 18 degrees.
00:33
All right.
00:34
So, first of, what is angle c? so angle c will be, because this will be used as an intermediate calculation.
00:41
So angle c is going to be 180 minus angle a plus angle b.
00:47
So angle a is 41 degree, 30 minute plus angle b is 18 degrees.
00:52
And 41 degree, 30 minutes is nothing.
00:54
But we know that 30 minutes means half radiance.
00:57
So that will be 41 .5 plus 18.
01:00
Because 60 minute has one degrees, so 30 minutes has definitely half degrees or 0 .5 degrees.
01:08
So let me just add it up using a calculator and get the value of c, which is coming as 120 .5 degrees, 120 .5 degrees.
01:18
And now i use law of science, law of science to find the value of small b and small c.
01:26
So this is one opposite pair, which i'm going to use...