Trigonometry
Trigonometry
Secondary 3
4 marks
Triangle \(ABC\) has \(AB = 7\) cm, \(AC = 8\) cm and \(BC = 13\) cm. Find
\(\angle A\) to \(1\) decimal place
[2]the area of triangle \(ABC\) to \(3\) s.f.
[2]
Solution:
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Answer:(a) \(120.0^\circ\) (b) \(24.2\text{ cm}^2\).
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