Operation Manual

Chapter 17: Activities 314
4. Enter the expressions to define the sine curve.
5. Press r. As the graph is plotting, you may press Í to pause and Í again to resume
graphing as you watch the sine function “unwrap” from the unit circle.
Note:
• You can generalize the unwrapping. Replace
sin(T) in Y2T with any other trig function to unwrap
that function.
• You can graph the functions again by turning the functions off and then turning them back on on
the Y= editor or by using the FnOff and FnOn commands on the home screen.
Finding the Area between Curves
Problem
Find the area of the region bounded by:
Procedure
1. Select the default mode settings y L 7 2 2. Press z to view.
2. Press p. Set the viewing window.
3. Press o. Turn off all functions and stat plots. Enter the upper and lower functions.
f(x)
g(x)
x
=
=
=
300x / (x
2
+ 625)
3cos(.1x)
75
Xmin=0
Xmax=100
Xscl=10
Ymin=
L5
Ymax=10
Yscl=1
Xres=1