The law of sine is an equation of great utility in trigonometry. This type of equation has been applied in various contexts as the analysis of the relationship between angle of formation and sheet thickness of aluminum in processes of embossment, also in an instance in the duality of polar spaces of constant curvature. The applications are made obvious in the sense that it is analyzed and continually ponders the theoretical formality. In this article, we show a our own theorem and corollary which is useful in trigonometry.
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