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and trigonometry - Cambridge University Press
P1: FXS/ABE P2: FXS 9780521740517c14.xml CUAU031-EVANS September 6, 2008 13:36 414 Essential Further Mathematics — Module 2 Geometry and trigonometry 2 Apply the cosine rule in triangle ABC. 3 Write down your answer. To find the bearing of B from A, the magnitude of angle BAC must first be found. The sine rule can be used.
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