law of sines

This article is about the law of sines in trigonometry. For the law of sines in physics, see Snell's law. In trigonometry, the law of sines (or sine law, sine formula) is a statement about arbitrary triangles in the plane. If the sides of the triangle are a, b and c and the angles opposite to those sides are A, B and C, then the law of sines states:
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