Formula for sin law: sin(A)/a + sin(B)/b + sin(C)/c
this formula will only work for a triangle if you have 3 clues and 2 angles with an opposite side, if you do not have an angle with the length of the opposite side, it will not work
for example: ABC
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here is an example of the sine law with ABC using 2 angles opposit of sides but only one side.