Question

A ladder of length 5.8m is placed against the wall so that the foot of the ladder is 3.6m from the wall. Calculate the angle the ladder makes with the ground

Answer 1

The ladder forms a right triangle with the wall, where the floor and the wall form the legs, and the ladder is the hypotenuse.

Let the angle ladder makes with the floor be x.

Then by definition of the ratio cosine,
cosine(x)=adjacent side (floor)/hypotenuse
=3.6/5.8

On the calculator, use the inverse function acos, or cos^-1to find the value of x, i.e.
x=acos(3.6/5.8)

Do not forget the parentheses around 3.6/5.8, else the answer will not be correct.

Answer 2

What is the answer

Answer 3

What the answer after that

Answer 4

Let me know

Answer 5

I don't know but I will use angle of elevation and depression by using SOH CAH TOA