Understanding the O-Level A-Math Formula Sheet

For students taking the 4049 Additional Mathematics GCE O-Level syllabus, the official formula sheet is a powerful reference tool during exams. However, it’s only helpful if you know how to use it effectively.

This formula sheet includes key equations under Algebra and Trigonometry—but it doesn’t cover everything. Knowing where these formulas apply can give you an edge in your calculations and boost your problem-solving speed under timed conditions.

Key Terms and Topics to Note:

1. Quadratic Formula – Appears under Algebra and is crucial for solving any quadratic equation quickly. Be confident in identifying when to use this over completing the square or factorisation.

    

2. Binomial Expansion – The general form is provided, but students still need to apply it properly in expansion questions. Understanding the structure of coefficients and powers is essential.

    

3. Trigonometric Identities – This section includes foundational identities like

    

   • Sin⁡2 A + cos⁡⁡2 A = 1

      

   • Double angle and addition formulas
     These are indispensable for simplifying expressions or solving trigonometric equations in exams.

      

4. Formulae for Triangle Geometry – Includes Sine Rule, Cosine Rule, and Area of Triangle formulas. Useful for geometry and vector-related applications where angles and lengths are involved.
   
   

O Level A Math Formula Sheet (Syllabus 4049) 2026 

Exam Tip:

While this formula sheet is allowed during exams, it will not help if you don’t know when or why to use the formulas. Regular practice and understanding the types of questions each formula is associated with will prepare you to use this sheet effectively under exam pressure.