Ahelicopter flies 250 km on a straight path in a direction 60° south of east. the east component of the helicopter’s displacement is km.

125km

Explanation:

the east component is given by the cosine function of the given angle.

because of the triangle that is formed between the east component end the south-east component

in this case the angle is:

the adyacent Leg is the east component

and the hypotenuse:

so:

we clear for the east component:

you can see the the triangle in the attached image, where the blue line is the east component

i believe the answer is a