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The Cosine Rule

Which angle must be known to find a missing side using the Cosine Rule?

A

A non-included angle (an angle not between the two known sides).

B

The included angle (the angle between the two known sides).

C

The exterior angle (the angle outside the triangle).

D

The opposite angle (the angle opposite one of the known sides).

The Cosine Rule Flashcards

  1. GCSE
  2. /Maths
  3. /The Cosine Rule

Flashcards for AQA GCSE Maths The Cosine Rule, covering the key formulae, methods and definitions you need to recall for Paper 1, Paper 2 and Paper 3. 22 cards, matched to the AQA GCSE Maths (8300) specification.

Flashcards

SurdsBoundsDirect and Inverse ProportionQuadratic FormulaFactorising Harder QuadraticsAlgebraic FractionsRearranging Harder FormulaeInverse and Composite FunctionsIterationFinding the Area of Any TriangleThe Sine RuleThe Cosine RuleCongruent Triangles3d Pythagoras and TrigonometryHistogramsConditional Probability