law of sines


noun Trigonometry.

a law stating that the ratio of a side of a plane triangle to the sine of the opposite angle is the same for all three sides.
a law stating that the ratio of the sine of an arc of a spherical triangle to the sine of the opposite angle is the same for all three arcs.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019