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! :)"

New Resources

Pythagorean Theorem: Quick Illustrator
希尔伯特曲线
Quadrant Illustrator 2
Pythagorean Theorem: Extension Exercises
Odd Function Explorer

Discover Resources

Spinning Your Wheels 2
Three_Phase Generation
Geometry 4.5.1
circle challenge
NONPARALLEL

Discover Topics

Numbers
Distributions
Complex Numbers
Step Functions
Trigonometric Functions