IP EMaths Notes (Upper Sec, Year 3-4): 09) Right-Triangle Trigonometry
Download printable cheat-sheet (CC-BY 4.0)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): 09) Right-Triangle Trigonometry cover?
A: Use sine, cosine, and tangent ratios alongside Pythagoras to evaluate sides and angles quickly.
Right-angled triangles provide fast access to heights, bearings, and resultant forces. Remember which side is opposite, adjacent, or hypotenuse relative to the marked angle.
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.
Ratio recap
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