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

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08 Nov 2025, 00:00 Z

Reviewed by

Marcus Pang·Managing Director (Maths)

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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.

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These notes align with SEAB GCE O-Level Mathematics (4052) content used in IP programmes (exams from 2026).

Status: SEAB O-Level Mathematics 4052 syllabus (exams from 2026) checked 2025-11-30 - scope unchanged; remains the reference for these notes.

Formula summary

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