Transcript Slide 1
Sine Tangent Cosine Hypotenuse Why do we use three figures for bearings? Two ships leave a port at 13:00. Ship A travels on a bearing of 075° at a speed of 12 km/h Ship B travels on a bearing of 110° at a speed of 30 km/h. 1. Find y 5 cm 120° 7 cm y 3. Find y 2. Find y 50° y 60° 8 cm 9 cm 10 cm y 11 cm Learn the sine rule a = b = c sin A sin B sin C and cosine rule 2 a = b2 + c2 – 2bc cosA a) How far apart are the ships at 15:30? b) What is the bearing of ship A from ship B?