Circular (trigonometric) functions — A/L Combined Mathematics

What should I read on Circular (trigonometric) functions?

Work through these in order. Resources in English.

1. 1. Start here · Explanation
   Khan Academy Trigonometry — Graphs of Circular Functions and Periodicity

   This link opens the whole course, not a page on this topic. It follows its publisher's own syllabus, not the NIE syllabus.

   Free lessons with short videos and practice exercises. Use it to learn the idea step by step before you attempt exam questions.

   Source: Khan Academy — Trigonometry
2. 2. Then · Interactive tool
   PhET Trig Tour Interactive Simulation (Unit Circle & Periodic Functions)

   Free interactive simulations from the University of Colorado Boulder. Use it to change one variable at a time and see what happens.

   Source: PhET Interactive Simulations, University of Colorado Boulder

Next in the syllabus

Where does Circular (trigonometric) functions fit in the syllabus?

Year 1 · Term 2