9-3

This week in advanced math we are learning lesson 9-3.. Law of Sines. When you dont have a right triangle you are going to want to use the Law of Cosines, because you can't use SOHCAHTOA. You are only going to be able to figure the triangle out correctly is if you know the opposite leg and angle value.
FORMULA:
sin(angle)/ opposite leg=sin(angle2 / opposite leg 2

REMEMBER: always cross multiply to solve.

EXAMPLE:
A=50(degrees) B=55(degrees) a=10
now you are going to draw your triangle
now subtract 50 and 55 from 180 to give you your third angle.
C= 75(degrees)
use the formula
sin75 / 10=sin50/x
xsin75= 10sin50
10sin50/ sin75
= 10.249

This is a really confusing section.