Law of Sines Small 320×84 Medium 640×168 Large 1024×269 Download Tiff Original 2400×631 | (129.8 KB) Description Illustration two types of triangles that can be used to model the law of sines. "In a plane triangle any two sides are to each other as the sines of the opposite angles." Keywords angle, sin, Sine, trig functions, trigonometric, trigonometry Galleries Trigonometry: Functions Source: George N. Bauer, PH.D. and W.E. Brooke, C.E., M.A. Plane And Spherical Trigonometry (Boston: D.C. Heath & Co., 1917) 84