he wants his west component to be 5
20 cos x across to north
20 sin x west
20 sin x = 5
sin x = 5/20 = 1/4
x = 14.5 deg
A straight river flows east at a speed of 5 km/h. A motorboat has a speed of 20 km/h relative to the river. A boater wants to arrive at a point on the north shore of the river directly opposite to the starting point. In what direction of northwest should the boat be headed?
Ans: sin−1 (1⁄4)
1 answer
1 answer