Sharp EL-9900 - Manual (Page 104)

94
Chapter 6: Advanced Graphing Features — Advanced Keyboard
2. Press Y to verify the
previously entered polar
graph equation, then press
G to draw the graph.
Adjust the view by using
Z menu items.
3. Press @ k.
4. Press 1 to select 1
Value. The graph is drawn
back on the screen again,
with the θ= prompt visible at
the bottom left side of the screen.
5. Enter the θ value at the
prompt. Enter π, for example.
Be aware that
θ cannot be
more than 2
π (2π radians =
360 degrees).
6. Upon pressing E, the radian r coordinate will be calcu-
lated.
Note: When coordinate system is Polar, Param or Seq, only 1 Value is
selectable in the CALC menu.
See Chapter 4 “Basic Graphing Features — Basic Keyboard” on
pages 60 to 61 for details of the other sub-menu tools available.
7 Inflec Calculates the inflection point of the given graph and moves the
cursor to that point.
Example
1. Enter the graph equation
Y1 = x 3 – 3x 2 + 2.
2. Press @ k 7.
Advanced
keyboard
specific sub-
menus