I wrote an earlier post on some **Trigonometry resources. **To learn more about Trigonometry including graphing the trigonometric functions and how they are defined for angles greater than 90° try **these applets** from John Page’s Math Open reference. There are graphing applets for **sine**, **cosine** and **tangent. **Note that you can drag point A to alter the angle and see how this relates to the graph; try Progressive mode to see the graph develop. Choose the Full screen option for a very clear display.

You will find many other excellent applets on this site, see the **full index here**.

This **Evernote shared notebook** (after selecting the link just choose to view the notebook) shows the three trigonometric functions plotted with the Desmos graphing calculator, each note has a link to a graph page. You could use these to solve simple equations like sinx = 0.2 for example. Simply adjust the slider then click on the points of intersection.

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