trigon_0509 [9 marks]

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Details

Topic: Trigonometry and bearings (Trigonometry)
Marks: 9
Tier: Extended
Style: Structured
Calculator: Not tagged yet
Status: Usable
Source: trigonbearingclassified.pdf, page 22, 0580/41/M/J/11 (original Paper 4)
Import issues: None

Part	Answer	Mark	Guidance
(a)(i)	58.4° (58.41…)	4	M2 for (14² + 6² − 12²) / (2 × 14 × 6) (M1 for implicit form); A1 for 0.5238…; A1
(a)(ii)	35.8 (35.77…)	2	M1 for ½ × 14 × 6 × sin(their angle)
(b)	36.4° (36.44…)	3	M2 for sin RQP = 12 sin 117° / 18 (M1 for implicit form); A1