Mathematics A-Level
reference angle
What reference angle means in Mathematics A-Level, as defined for Pearson Edexcel.
Definition of reference angle
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Reference: Pearson Edexcel
The positive acute angle between the terminal arm of an angle and the x-axis.
Topics that use reference angle
- Trigonometry (Pearson Edexcel A-Level)
Related terms
- Arcsin, arccos and arctan
- area of a triangle
- Asymptotes
- Domain
- Domains of reciprocal functions
- Equations involving multiples of the unknown angle
- Exact values
- Fundamental trigonometric identities
Using reference angle in the exam
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