Trigonometry, SMB-063 Find the value of \(x\), correct to 1 decimal place. (3 marks) Show Answers Only \(x=15.4\ \text{cm}\) Show Worked Solution \(a^2\) \(=b^2+c^2-2bc\ \cos A \) \(x^2\) \(= 15^2+25^2-2 \times 15 \times 25 \times \cos 35^{\circ}\) \(= 235.63…\) \(\therefore x\) \(=15.35…\) \(=15.4\ \text{cm (1 d.p.)} \)
