3 Unit Circle Trigonometry
In This Chapter
The shape of a plucked guitar string, fixed at both ends, can be described by trigonometric functions of a real variable.
A Bit of History The discussion in Section 2.4 leads directly to a more analytical approach to trigonometry where the cosine and sine are defined as the x-and y-coordinates, respectively, of a point (x, y) on a unit circle. It is this interpretation of ...