IP EMaths Notes (Upper Sec, Year 3-4): 10) Trigonometric Applications

Download printable cheat-sheet (CC-BY 4.0)

08 Nov 2025, 00:00 Z

Reviewed by

Marcus Pang·Managing Director (Maths)

Join our Telegram study group

Want small-group support? Browse our IP Maths Tuition hub.

Q: What does IP EMaths Notes (Upper Sec, Year 3-4): 10) Trigonometric Applications cover?
A: Apply sine and cosine rules, bearings, and area formulas to non-right-angled triangles and navigation tasks.

Extend beyond right triangles with the sine rule, cosine rule, and $\tfrac{1}{2} ab \sin C$. Always sketch the triangle or bearing diagram first to avoid angle ambiguity.

Keep the full topic roadmap handy via our IP Maths tuition hub so you can jump into related drills, quizzes, or diagnostics as you move through these notes.

These notes align with SEAB GCE O-Level Mathematics (4048) content used in IP programmes (exams from 2026).

Status: SEAB O-Level Mathematics 4048 syllabus (exams from 2026) checked 2025-11-30 - scope unchanged; remains the reference for these notes.

Formula summary

• Sine rule: $\dfrac{a}{\sin A} = \dfrac{b}{\sin B} = \dfrac{c}{\sin C}$