Mathematics A-Level
reference triangles
What reference triangles means in Mathematics A-Level, as defined for WJEC.
Definition of reference triangles
Check what you remember
Read the wording for your board, then hide it and explain reference triangles in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: WJEC
Standard triangles from which exact trigonometric ratios derive: the equilateral triangle of side 2 split in half, and the isosceles right-angled triangle with legs 1, 1 and hypotenuse √2.
Topics that use reference triangles
- Trigonometry (A2 Unit 3: Pure Mathematics B) (WJEC A-Level)
Related terms
- composite trigonometric arguments
- domain and range
- double angle formulas
- exact trigonometric values
- harmonic form
- inverse trigonometric functions
- mixed angle equations
- power reduction identities
Using reference triangles in the exam
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