A ship sails from a port P P\,P on a bearing of 070° 070°\,070° for 12 km to a point QQQ.
It then sails on a bearing of 145° 145°\,145° for 9 km to a point RRR.
Show that angle PQR=105°PQR = 105°PQR=105°.
Find the distance PRPRPR, giving your answer to 3 significant figures.
97 exam-style questions on WJEC A Level Maths 1.5 Trigonometry, covering 1.5.1 Trigonometry, 1.5.2 Trigonometry, 1.5.3 Trigonometry, 1.5.4 Trigonometry, and 1.5.5 Trigonometry. Each one has a worked solution and a mark scheme showing where the marks go.