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More applets of Mrs.Sajna Santosh can be viewed  at http://www.geogebratube.org/user/profile/id/1909

Introdction to trigonometry

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Insructions for how to use the above applet:

Step 1:Play animation and observe what is happening to the  right triangle as  the value of q changes?
Step2: Check box 'Ratio1' and  observe  how the  change of 'q' is effecting  the ratio p/q
Step3:Check box 'Name ratio1' to  see the ratio
Step4: Check box 'Ratio2' and  observe  how the change of 'q'  is effecting  the ratio r/q
Step5:Check box 'Name ratio2' to see the  ratio
Step6: Check box 'Ratio3' and  observe  how the change of 'q' is  effecting  the ratio p/r
Step7:Check box 'Name ratio3' to see the   ratio.
Step8: Stop animation , Change the position of R and repeat the previous steps.Note down your observartion.

Click and change  the position of one of the vertices of the quadrilateral ABCD. Observe What is happening..... What is your conclusion?

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