Sharp EL-9900 User Manual

Page 104

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

–

2. Press

@ k 7.

Advanced

keyboard

specific sub-

menus