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Author:
Haotian Ye
The maximum and minimum values are at 5 and -5 respectively. When r=0, theta=0.7854. The period of my equation is pi/2.
GeoGebra
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Angles and Intersecting Lines: Quick Investigation
Rotating Points (Optical Illusion)
Ellipse as Envelope - Correspondence Method
Piano. Keyboard.
Stairs (Optical Illusion)
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Linusbyberg
perp bisector
Lemniscata 2
Incenter Animations
Conditions for a block to slip downwards on a rough plane.
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Straight Lines
Similar Triangles
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