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  • Engineering Notes

A-Level Maths Cheat Sheet

This is absolutely not a cheat sheet... We do not endorse cheating at all! It's just a better name than "List of vital but forgettable equations for A Level Maths"


The Formula Book for Edexcel A-Level Maths and Further Maths can be seen here and downloaded here:

Edexcel Maths Formula Book
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Download • 2.29MB


Trigonometry


Cosine Rule

a² = b² + c² - 2bc cosA


Area of a Triangle

Area = ½ ab sinC


Radians

1° = π/180
1 rad = 180/π


Small Angle Approximations

sinθ ≈ θ
tanθ ≈ θ
cosθ ≈ 1 - θ²/2


Trig Identities

sin² θ + cos² θ ≡ 1
tan θ ≡ sin θ / cos θ
1 + tan² x ≡ sec² x
1 + cot² x ≡ cosec² x