O Level · Additional Mathematics
35+ O Level A Math Trigonometry Practice Questions for 2026 (based on Singapore MOE Syllabus)
O Level Additional Math trigonometry covers identities, R-formula, equations, and graphs. This page has 35+ AMath trig questions with full worked solutions for 2026 Singapore exams.
35 free sample questions below — answers and step-by-step solutions included.
Free on Tutorly.sg
Want more Trigonometry questions — with step-by-step help?
These 35 questions are a sample. On Tutorly.sg/app you can practise unlimited O Level Additional Mathematics questions, get instant explanations after you try, and use past-year papers — no sign-up needed to start.
- ✓ Unlimited practice questions (not just 10)
- ✓ Step-by-step working when you are stuck
- ✓ Singapore syllabus: O Level
Opens tutorly.sg/app — same subject ready for you.
- Question 1easy
- Question 2easy
- Question 3medium
- Question 4hard
- Question 5hard
- Question 6easy
- Question 7easy
- Question 8medium
- Question 9hard
- Question 10hard
- Question 11easy
- Question 12easy
- Question 13medium
- Question 14hard
- Question 15hard
- Question 16easy
- Question 17easy
- Question 18medium
- Question 19hard
- Question 20hard
- Question 21easy
- Question 22easy
- Question 23medium
- Question 24hard
- Question 25hard
- Question 26easy
- Question 27easy
- Question 28medium
- Question 29hard
- Question 30hard
- Question 31easy
- Question 32easy
- Question 33medium
- Question 34hard
- Question 35hard
Frequently asked questions
- What is the R-formula in O Level AMath?
- a sin θ + b cos θ = R sin(θ + α) or R cos(θ − α). Use it to solve equations and find maximum/minimum values. R = √(a² + b²).
- Which trig identities must I memorise for AMath?
- Know sin²θ + cos²θ = 1, tan θ = sin θ / cos θ, addition formulae, double-angle formulae, and how to prove identities by working one side to the other.
- How do I solve trigonometric equations?
- Isolate the trig function, find the principal value, then use the ASTC quadrant rule to find all solutions in the given domain. Check the question's angle range carefully.
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Free on Tutorly.sg
Want more Trigonometry questions — with step-by-step help?
These 35 questions are a sample. On Tutorly.sg/app you can practise unlimited O Level Additional Mathematics questions, get instant explanations after you try, and use past-year papers — no sign-up needed to start.
- ✓ Unlimited practice questions (not just 10)
- ✓ Step-by-step working when you are stuck
- ✓ Singapore syllabus: O Level
Opens tutorly.sg/app — same subject ready for you.
Study this topic in depth
Notes, worked examples, common mistakes, and exam tips for Trigonometry.
O Level AMath — Trigonometry & Identities hub →