Law of Sines :)

This week in class we learned about the law of sines. The law of sines are only used for non-right triangles when they have a pair, which is when you have the side and the angle opposite of it. You must fill out the triangle once you find the sides because if not you will get them all wrong because B-Rob is not searching through your work for your answer.

All triangles equal 180 degrees.

Formula: sin a/a = sin b/b = sin c/c

Cross multiply to solve!

You get two answers for inverses and you have to check them to see if they work.

Example 1.) Solve triangle ABC.

To find angle C you have to subtract 180-65-65 and get 50.

sin 65/6= sin 65/b

b=6

sin65/6=sin 50/c

c=5.071