Trigonometry, SMB-062 Find the value of \(x\), correct to 1 decimal place. (3 marks) Show Answers Only \(x=8.8\ \text{m}\) Show Worked Solution \(a^2\) \(=b^2+c^2-2bc\ \cos A \) \(x^2\) \(= 5^2+9^2-2 \times 5 \times 9 \times \cos 72^{\circ}\) \(= 78.188…\) \(\therefore x\) \(=8.842…\) \(=8.8\ \text{m (1 d.p.)} \)
