The Law of Sines (sine rule) is an important rule relating the sides and angles of any triangle (it doesn't have to be right-angled!):
If a, b and c are the lengths of the sides opposite the angles A, B and C in a triangle, then:
a = b = c
sinA sinB sinC
If you wanted to find an angle, you can write this as:
sinA = sinB = sinC
a b c
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