00:01
In a b c, using the sign formula, we can write sine 100 or sign b by ac equals to sine c by ab.
00:30
Similarly in triangle f b.
00:37
We can write sign 50 degree that is sign of angle fbc which is equal to 50 degree divided by fc equals to sign c divided by f b so now for we go our first triangle that is angle a, b, c and put the values.
01:17
Sign b is here 100 degree, that is sign 100 divided by a, c, that is 9.
01:35
Sign c, we have to find, and ab which is equal to 6.
01:42
Upon calculation we will get c equals to 41 degree.
01:48
So this value c is here 41 degree.
01:57
Now similarly we can find the angle bfc which is equal to 180 minus 50 plus 41 degree that is equals to 89 degree so we can write here 89 degree or angle bfc or angle bfc or angle bfc equals to 89 degree.
02:29
Afterward in triangle bfc we can write sine 89 degree divided by 7 .5 equals to sign 50 degree divided by fc.
02:53
On solving we will get the value of fc comes equals to 5 .4 unit, that is fc equals to 5 .4 unit or at value of the x...
