TI-83 Plus Split Screen 247
3. Press o to display the Y= editor for Par
graphing mode. Press ™ „ ¤ Í to
store cos(T) to X1T. Press ˜ „ ¤ Í
to store sin(T) to Y1T.
4. Press p to display the window editor.
Enter these values for the window variables.
Tmin=0 Xmin=L2.3 Ymin=L2.5
Tmax=360 Xmax=2.3 Ymax=2.5
Tstep=15 Xscl=1 Yscl=1
5. Press r. On the left, the unit circle is
graphed parametrically in Degree mode and the
trace cursor is activated. When T=0 (from the
graph trace coordinates), you can see from the
table on the right that the value of X1T (cos(T)) is
1 and Y1T (sin(T)) is 0. Press ~ to move the
cursor to the next 15° angle increment. As you
trace around the circle in steps of 15°, an
approximation of the standard value for each
angle is highlighted in the table.