A speed boat travels 10km south then 8km east. Find the speed boats bearing from its starting point to the nearest degree.
tanθ= (8/10)
θ= tan-1(8/10)
= 39° (nearest degree)
The bearing from B to O= 180°-θ
= 180° -39°
= 141°
A family on a road trip drives 20km on a bearing of 330° from point A to point B, Find how far west point B is from point A.
sin30= x/20
x= 20sin30
= 10km
A pigeon delivers a letter from its master on a bearing of 315°The pigeon is flying at a speed of 50km/hour. How far west of the castle is the pigeon? to one d.p
cos45= x/50
x= 50cos45
= 35.4km
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