At what angle of elevation must
a 5.2 meter ladder be placed to
reach a vertical height of 3.8
meters on a wall?

Angle of elevation,

Step-by-step explanation:

We have,

Height of a wall, AB = 3.8 m

Length of the ladder, AC = 5.2 m

It is required to find the angle of elevation. According to the attached figure, it is clear that we can find angle of elevation using trigonometry. such that,

So, the angle of elevation must be 46.88 degrees.      

step-by-step explanation:

mean or average is 40.6