Paper 2 · Trigonometry
Lesson 7 of 9
Trigonometry 2.7: Unit circle on the axes
This tutorial is for members
Read the lesson notes free below — subscribe to watch the full worked video and download the PDF.
Subscribe for full access · €199/yrYou’ll learn
- Spot the edge cases sin A = 0, ±1 and cos A = 0, ±1 where CAST doesn't apply
- Read the answers off the four axis points (1, 0), (0, 1), (−1, 0), (0, −1)
- Count answers by checking the endpoints — sin A = 0 has three on 0° ≤ A ≤ 360°
💬 Stuck on something in this lesson?
Send your question with this lesson’s name attached — you’ll get a reply by email.