Disease-modifying antirheumatic drugs (DMARDs) decrease or stop joint damage caused by rheumatoid arthritis (RA) and other conditions and diseases and can often preserve use of joints.
The Law of Sines (or Sine Rule) is very useful for solving triangles: a sin A = b sin B = c sin C. It works for any triangle: a, b and c are sides. A, B and C are angles. (Side a faces angle A, side b faces angle B and side c faces angle C). And it says that: When we divide side a by the sine of angle A. it is equal to side b divided by the sine of angle B, and also equal to side c divided by the sine of angle C.
Specifying a sine (or cosine) curve with a given amplitude, period, and phase shift defines a unique set of points in the plane. However, there are infinitely many equations that can describe that set of points! For example, the set of points given by the sine curve with amplitude $\,5\,$, period $\,3\,$, and phase shift $\,2\,$.