trigon_0491 [4 marks]

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Details

Topic: Trigonometry and bearings (Trigonometry)
Marks: 4
Tier: Extended
Style: Short answer
Calculator: Calculator-free
Status: Usable
Source: trigonbearingclassified.pdf, page 2, 0580/22/O/N/11 (original Paper 2)
Import issues: None

Part	Answer	Mark	Guidance
(a)	52°	2	B1 for angle BAC = 38° (angle at centre = 2 × angle at circumference) or angle ACT = 90° (tangent ⟂ radius)
(b)	322°	2	B1 for angle OCB = 52° (isosceles triangle OBC)