Mathematics A-Level
multiple-angle equations
What multiple-angle equations means in Mathematics A-Level, as defined for WJEC.
Definition of multiple-angle equations
Check what you remember
Read the wording for your board, then hide it and explain multiple-angle equations in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: WJEC
Equations such as sin(2x + 30°) = 0.5 where the interval for the composite angle is transformed first, all solutions for that angle are found, and finally x is solved for.
Topics that use multiple-angle equations
- Trigonometry (AS Unit 1: Pure Mathematics A) (WJEC A-Level)
Related terms
- area of a triangle
- CAST diagram
- cosine rule
- equation solving
- factorisation
- periodic solutions
- principal value
- trigonometric definitions
Using multiple-angle equations in the exam
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