This week in math we learned about sine law, which is used to find the angles and sides of triangles that don’t contain a ninety degree angle. In order to verify the use of sine law you require 3 important pieces of information, two of which need to be related to each other (e.g. Angle A, needs side a). If you do not have a completed fraction you cannot do sine law and the triangle would most likely need cosine law. The equation for sine law is the following…

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There are two version because both are used for different functions. Usually you want whatever you are looking for to be in the numerator. So, that means that the top equation is to find an angle while the bottom is to find a side length.

In order to solve, like said before you require a completed fraction as well as one with at least one piece of information, this would usually be the variable you are trying to find but there are cases where you need to complete an extra step if there are no available variables.