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Year 12 Methods (Unit 3 & 4) Trigonometry using the sine and cosine rules

The cosine rule

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Question 1
194409
In \(\triangle ABC\), \(AB=8\text{ cm}\), \(BC=5\text{ cm}\) and the included angle \(\angle ABC=60^\circ\). Find the length of \(AC\).
\(7\text{ cm}\)

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