Trigonometry
Trigonometry
Secondary 3
3 marks
In triangle \(ABC\), \(\angle A = 42^\circ\), \(\angle B = 71^\circ\), and side \(a = BC = 8.5\text{ cm}\). Find side \(b = AC\) to \(3\text{ s.f.}\) (Diagram not drawn to scale)[3]
Solution:
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Answer:\(b=11.9\text{ cm}\) (3 s.f.)
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