Quadrant
This is an interactive visual aid for trigonometry teachers who want to
show how the values and signs of trigonometric ratios are determined in all
four quadrants. It is especially useful to show when sides approach zero or
approach unity on the the quadrantal angles (0, 90, 180, 270).
A unit circle is displayed, and the hypotenuse, opposite, and adjacent sides
are displayed and moved by the mouse while the trigonometric ratios,
sine, cosine, and tangent change accordingly.
It's very simple to use!
Programmed by Mervin Bitikofer using Visual Basic 6.0
2008
System requirements: Windows 98 or later,
uses mouse and needs at least 1024x768 resolution display.
Status: Freeware -- enjoy!
Download program here:
quadrant.exe
(60 Kb)