Question

Find the angle made by a ladder of length 5m with the ground, if one of its end is 4m away from the wall and the other end is on the wall

Answer 1

AC is the length of the ladder.

In the right ΔABC,

cos θ = `"BC"/"AC"`

cos θ = `4/5`

= 0.8

cos θ = 0.8000

θ = 36°52′

Angle made by a ladder with the ground is 36°52′