00:01
In this problem we have given an angle which is theta prime is equal to 300 degrees.
00:08
Now we have to evaluate sine 300, cost 300 and 10 300 by using reference angles.
00:15
So here we have to find sign 300 degree and then cost 300 and then this is 10 300.
00:26
So, this would be 300 degree is equal so this can be written as say this.
00:32
This would be sine, this would be 2 pi minus, or we can say 360 minus, so we can write this term as 360 minus, this would be theta, or we can say this is 60 degree, which is equals to minus sine 60 degree, which is equals to minus root 3 divided with 2.
00:55
Now cost 300, so cost 300, we can say cost 360 degree, minus 60 is equal to minus 60 is equals to cost 60 so this is cost 60 which is equal to half and now 10 300.
01:13
So 10 300 is simply say this can be 10.
01:16
So this would be pi which is equal to 180 degree plus 120 which is equal to 10 120 degree which is equals to minus root 3.
01:30
So this is obtained by using the concept of a reference angle...