Answer:
The angle of elevation is given by,
∅ = [tex]sin^{-1}(0.1445) = 8.308 degrees[/tex]
Step-by-step explanation:
The length ladder is given as 20.75 feet.
The depth of ground is 3 feet below.
The figure formed is that of a right angled triangle.
Let the angle of elevation be ∅.
By trigonometry,
sin(∅) = [tex]\frac{opposite}{hypotenous} = \frac{3}{20.75} = 0.1445[/tex]
Thus, the angle of elevation is given by,
∅ = [tex]sin^{-1}(0.1445) = 8.308 degrees[/tex]
