Introduction to Sine

Trigonometry and Polar Coordinates

This applet focuses on the conversion between rectangular and polar coordinates. [br]Even without formal knowledge about polar coordinates, we can still ask how the direction and distance of a point from origin could be related to the usual coordinates, with a useful definition of sine and cosine values. [br][br]When you hide some of the values on the left, you can practise your estimation.

Sinimation

Sinimation! Have fun with a simple sine curve animated.
Sinimation
Can you recognise the sine graph and parameters making this pattern? [br]Pause the animation. Drag a and b to experiment or look for an image you like.

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