This week I learned Cosine Law and Sine law.

Cosine law is used when you are trying too find one side and you have the angle corresponding with it. Also you have the 2 other angles. Or it could be used when you have all 3 sides and you are looking for an angle.

Sine Law is used when you are looking for an angle or a side and you only have one angle and corresponding side and other side/ angle. If you are looking for an angle you would put Sin on top of the corresponding side (in the fraction) and if you were looking for a side then you would out the side over the correspond angle.