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6. Polar Graphing
Polar coordinates are a different method of specifying a point in two dimensions; the
location of the point is described by the distance from the X-Y intersect "r", and its
elevation angle "θ".
Example
• Draw a graph: r = 16cos( θ )sin( θ ).
1. Press @ ; .
2. Press E to select E
3. Press Y.
4. At the first entry row R1=,
5. Press G to draw the
r
θ
The SETUP menu appears.
COORD, then press 3
to select 3 Polar. Be sure
that the other settings are as
shown on the right.
To exit the SETUP menu,
press C.
The Graph Equation Entry window will appear.
×
enter 16cos( θ )
sin( θ ).
Press E.
graph.
Press Z, then press
6 to select 6 Square.
Chapter 4: Graphing Features
81
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