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The figure shows the idea of constructing
the function; y = sin x + cos x. Point A is on the unit circle, and point P is on the circle whose radius is 1 and whose center point is A. The angle OAP is always 90 degrees. When the figure OAP rotates arround the origin, the y-coordinate of point P is sin x + cos x.
The goal of the applet is to understand the following equality.
To draw the graph, press "Draw" button. |
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