We looked at the law of cosines today. It looks harder than it is. When we have non-right triangles we can use the law of sines and law of cosines to find unknown values.
We use the law of sines when we have two angles in a triangle and a side
We use the law of cosines when we have 2 sides given and the angle in between, or when we have all three side lengths and we're trying to find an angle measure. Fun stuff!
HW: Pg. 586 #5-7, 22, 23
February 28 Notes
