MBF3C Cosine Law Worksheet Pre-practice (Optional): 1. Find the missing side length in each triangle, to the nearest tenth of a unit. a) b) 48 4.4 m 1.8 cm 2.2 cm 66 D 3.2 m 2. Solve for the indicated angle, to the nearest degree. a) b) 13 cm 2.4 m 1.8 m 14 cm 16 cm 2.5 m Mandatory Practice (no calculator): 3. Sketch each triangle and use the given information to find the missing side length, to the nearest tenth of a unit. a) In acute ATUV, t = 1.8 cm, v = 1.4 cm, and ZU = 52. b) In acute ADEF, e = 1.1 km, f = 1.6 km, and ZD = 54. 4. Solve each triangle. a ) b ) 5 cm 6 cm 15 cm 7 cm 13 cm 5. A distress signal is received from a ship that is 21 km from one port and 17 km from another port. The eastern port is 24 km directly east of the western port. At what angle to the western shoreline should the ship head, in order to dock at the western port? Round to the nearest degree. Ship 17 km 21 km Western Eastern Port 24 km Port