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Copy of Addition formula for cosine
Author:
sevans134
,
Malin Christersson
Change the angles to see the cases in all four quadrants.
GeoGebra
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Sine in Cartesian and Polar Coordinates
Tangent in Cartesian and Polar Coordinates
רישום חופשי
Special Right Triangles 30°-60°-90° and 45°-45°-90°
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