Applying Cosine Rule When Given 2 Sides and 1 Included Angle

Applying Cosine Rule When Given 2 Sides and 1 Included Angle

Secondary 3

\(ABC\) is a triangle with \(AC=10\) cm, \(BC=12\) cm and \(\angle ACB=60{}^\circ\).
Find the length of \(AB\), correct to \(3\) significant figures.

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Answer:\(11.1\text{ cm}\)

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