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A.S.T.C
Author:
Ang Wee Kiat
Here you can explore how the sign of the trigonometrical ratios change when the angles are in different quadrants. Remember the acronym "ASTC - All School Teachers Care! :)"
GeoGebra
New Resources
Construct a Conic
Parallelograms: Quick Investigation
Icosahedron1
Sphere on a Grid
Shadow of a Cube (v2)
Discover Resources
簡易方程1
animation - square root spiral
A billiard table for illustrating the ellipse inscribed in a rectangle
Radijani
Flower by Vlad Bargan
Discover Topics
Interest Calculation
Differential Calculus
Symmetry
Integral Calculus
Ratios