Posted by lindsay on Saturday, April 21, 2012 at 5:20pm.
a ship travels 8km due north then 7km on a bearing of 070 degrees
1. draw a diagram to represent the information
2. calculate the distance and bearing of the ship from its starting point

trigonometry  Steve, Saturday, April 21, 2012 at 5:27pm
ships travel on headings, not bearings.
Anyway, you draw the diagram.
Starting from (0,0), going N puts you at (0,8)
Then, 7 km at 70° moves you another (7cos70°, 7sin70°) = (2.39,6.58), leaving you at (2.39,1.42)
Final distance is 2.78, on a bearing of arctan(1.42/2.39) = 30.7° from (0,0)