Answer:
31.0°
Step-by-step explanation:
You want the bearing from P to a ship that is 3 km east and 5 km north of P.
The bearing angle for the helicopter is the same as the angle at the ship between south and P. Since the side lengths of the triangle are given, we can use the tangent relation to find that angle:
Tan = Opposite/Adjacent
tan(bearing) = (3 km)/(5 km)
bearing = arctan(3/5) ≈ 31.0°
The helicopter should fly at an angle of 31.0° east of north.