Game Development Reference
In-Depth Information
Figure 12.21
The cosecant is undefined where the sine value is 0.
The cosecant values create a periodic pattern that alternates above and below the
x
axis, and the period of the secant graph is 2
. As Figure 12.21 illustrates, a
period begins at 0 and extends to 2
.
Using Visual Formula
You can use Visual Formula to explore a variety of trigonometric relationships.
To view the trigonometric functions Visual Formula provides, click the Trigo-
nometry menu item. You see a selection that includes the six basic trigonometric
functions. To explore but one possibility, consider the notion that the value of
the cosecant is the reciprocal of the value of the sine:
1
sin
csc
y ΒΌ
y
You can superimpose one graph on another using Visual Formula to see how
this is so. You know, for example, that at any point at which the value of
the sine equals 0, the value of the cosecant is undefined. In other words, it
