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Chapter 4: Graphing Features
8. The CALC Function
The CALC function utilizes the entered graph equation to calculate values. In
conjunction with the 4 graph coordinates, it can be called up anywhere. Note however
that the CALC function will not do anything if no graph equation has been entered or
specified.
The following is an example that uses the previously entered polar
graph equations above.
1. First, verify the graph
2. Press Y to verify the
3. Press @ k .
4. Press 1 to select 1
5. Enter the θ value at the
6. Upon pressing E, the radian r coordinate will be calculated.
86
coordinate mode by pressing
@ ; ; check to see
if E COORD is set to Polar.
If not, this will need to be
changed accordingly. Also,
make sure the angle unit B DRG is set to Rad. Otherwise the
graph will not be drawn correctly.
Press @ f , press F to select F CURSOR, and
2 to select 2 PolarCoord.
previously entered polar
graph equation, then press
G to draw the graph.
Adjust the view by using
Z menu items.
Value. The graph is drawn
back on the screen again,
with the θ= prompt visible
at the bottom left side of the
screen.
prompt. Enter π, for example.
Be aware that θ cannot be
more than 2π (2π radians =
360 degrees).
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