Trigonometry
Trigonometry
Secondary 3
3 marks
Two sides of a triangle are \(7\text{ cm}\) and \(10\text{ cm}\), and their included angle is \(120^\circ\). Find the third side to \(3\text{ s.f.}\)[3]
Solution:
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Answer:\(14.8\text{ cm}\) (3 s.f.)
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