Question

To go from town A to town B a plane must fly about 1780 km at an angle of 30 degree west of north. How far north of A is B?

Answer 1

This motion can be represented on a right angled triangle.

The point A and B lie on the same plane thus AB forms the length of the base of this triangle.

Since Point C is at an angle 30° from A, it forms the hypotenuse.

The length of the hypotenuse is :

= 1780Km.

We want to get length from North of A where B is.

This is the length CB.

Using trigonometric ratios we have :

Sin 30° = BC / 1780

BC = 1780 Sin 30°

BC = 890 km

Answer 2

Answer:

Refer to my attachment

Hope it helps you..