Question

A 5 foot long board is propped against the wall of a house. The board forms a 60% angle with the ground. How far is the base of the board from the wall?

Answer 1

2.5 ft

Explanation:

Cosine = adjacent / hypotenuse

cos 60° = x / 5

x = 5 cos 60°

x = 2.5

The base of the board is 2.5 feet from the wall.