The ladder with a length of 20 feet makes 19.4° with the ground.
Length of the ladder = 20 feet
Distance of base of the ladder from the wall = 5 feet
What is the Cosine of an angle?
The cosine of an angle is the ratio of the adjacent side(to that angle) to the hypotenuse of the right triangle.
Suppose the ladder makes [tex]0[/tex] from the ground.
So, [tex]Cos0=\frac{5}{20}[/tex]
[tex]Cos0=\frac{1}{4}[/tex]
[tex]0=Cos^{-1}(\frac{1}{4})[/tex]
[tex]0=Cos^{-1}0.3[/tex]
[tex]0=19.4[/tex]°
Thus, the ladder makes 19.4° with the ground.
To get more about trigonometric ratios visit:
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