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Edexcel 1MA1HigherNon-calculatorG23 Area of a triangle as ½ab sin C

Question 1 · 4 marks

Spec and skills
  • Paper scope: Paper 1: non-calculator practice
  • Spec G23
  • Spec G22
  • Original practice question
  • Answer and supported method checks
Triangle ABC has AB = 12 cm, AC = 9 cm and area 27327\sqrt{3} cm². Do not use a calculator.
(a)
Find the two possible sizes of angle BAC.
2 marks