25.7.1 The Law of Sines
Core ideaIn any triangle, each side stays in a fixed ratio to the sine of its opposite angle: a/sinA=b/sinB=c/sinC.
Module goal. We extend trig functions from the right triangle to any triangle, using the two great laws to convert freely between sides and angles, wrapping up this stage and handing the next, Sequences, a foundation of measurable relationships.