
Welcome
to the Teachers' Choice Software web site.
Our
FREE on line mathematics
'HowTo' library is open 24 hours a day.Â
The evergrowing library
now has 71 helpful topics, and every topic includes a free download!

The sine tool displays a movable sine or cosine function on the
graph view. (See below:)
Cursor
for sine mode:

Cursor
for cosine mode:



The sine tool also displays equations, coordinates and calculated values, and
plots the curves directly.Â
Select the sine tool by clicking the
button on the graph tools tool bar, or by selecting the 'Sine' command from the
'Tools' menu.
When the sine tool is selected, the sine tool
dialog box is displayed (See below:).


Drag on the title bar at
the top of the sine tool dialog box to move it.
 
Check
the 'cos' check box to model a cosine function. If the 'cos'
check box is unchecked, the tool models a sine function.Â



Check the 'Trace' check box to
trace the centre of the sine or cosine graph along a function curve.
 
Check the 'Snap to grid' option to
locate the centre of the sine or cosine graph at the corner of grid snap
rectangles.
 
Click the 'Cancel' button to stop
using the sine tool.

To plot the sine or cosine
function, press the space bar on the computer keyboard.
Changing the shape of the sine or cosine function:
With the sine tool displaying a sine or cosine graph on the graph view, click
and hold the left mouse button while moving the mouse.

Drag the mouse horizontally to
stretch or compress the graph horizontally. This changes the period
of the function.
 
Drag the mouse vertically to
change the height of the graph. This
changes the amplitude of the
function.
 
Hold down a Ctrl key and drag the mouse horizontally to change
the length of the cursor line.


For fine
adjustment, hold down a Shift
key as well.

Â 