JCHL Trigonometry
Right-angled triangles, Pythagoras and SOHCAHTOA — take it one triangle at a time.
Your progress through this topic0 of 6 lessons
Lessons in this topic
All 6 lessons, in order — each one ticks off as you open it.
1Pythagoras Theorem2SOHCAHTOA (Finding the Angle)3SOHCAHTOA (Finding the side)4Sketching a Right Angled Triangle5Degrees, Minutes and seconds6Sin(A) = Cos (90-A)
Key ideas in this topic
Every formula from these lessons in one place. The green ones are printed in the log tables booklet you get in the exam — the red ones you learn off.
📖 In the log tables
📖 In the log tables
📖 In the log tables
★ Must learn
Elevation = looking UP from the horizontal; depression = looking DOWN from the horizontal.
JCHL Trigonometry 2
★ Must learn
sin A and cos A are always between −1 and 1; tan A is not bounded — it can be any value.
JCHL Trigonometry 2
★ Must learn
