Casio ClassPad 300 PLUS - Manual (Page 208)

20050501
Example 2: To input the function r = 3sin2
θ into line 2 of Sheet 1 and graph it
In Example 1, we graphed a rectangular expression in the form of y = f ( x ). You can also input
polar coordinate expressions, inequalities, and other types of functions for graphing as well.
In this example, we input and graph the polar coordinate expression
r = 3sin2
θ. Note that
the following sample procedure assumes that you have already completed the steps for
Example 1.
u ClassPad Operation
(1) Tap anywhere inside of the Graph Editor window to make it active.
(2) Tap the down arrow next to “ y =”, or on the menu tap [Type]. On the list that appears,
tap “ r =”.
• This causes the line numbers next to any line on the Graph Editor window that does
not contain an expression to change from “ y ” to “ r ” ( r 2, r 3, etc.). The line numbers of
lines that already contain expressions do not change.
(3) Tap the input box to the right of line number r 2 and input the expression.
k9dTsc8)w
• Tapping w stores the expression you input and puts a check mark into the check
box to the left of line number r 2. When a line number has a check mark next to it, it
means that the expression is currently selected for graphing.
3-1-10
Graph & Table Application Overview