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Principles of Trigonometry: Solving for the Ambiguous Case

Principles of Trigonometry: Solving for the Ambiguous Case

Secondary 3

In the diagram, \(AB=6\) cm, \(BC=5\) cm and \(AC=4\) cm.
Without finding any angle, find the value of \(\cos B\).

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Answer:\(\cos B=\frac{3}{4}\)

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