Sharp el-9950

81
Chapter 4: Graphing Features
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
@
;
.
TheSETUPmenuappears.
2. Press
E
to select E
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
.
3. Press
Y
.
TheGraphEquationEntrywindowwillappear.
4. AttherstentryrowR1=,
enter
16cos(
θ
)
×
sin(
θ
)
.
Press
E
.
5. Press
G
to draw the
graph.
Press
Z
, then press
6
to select 6 Square.
θ
r