Question

A pole 11 feet tall is used to support a guy wire for a tower, which runs from the tower to a metal stake in the ground. After placing the pole, Rashaad measures the distance from the pole to the stake and from the pole to the tower, as shown in the diagram below. Find the length of the guy wire, to the nearest foot.

Answer 1

The given question is on trigonometry which requires the application of required function so as to determine the value known. So that the length of the guy wire is 67.0 feet.

Trigonometry is an aspect of mathematics that requires the application of some functions to determine the value of an unknown quantity.

Let the length of the guy wire be represented by l, and the angle that the guy wire makes with the stake be θ. So that applying the appropriate trigonometric function to determine the value of θ, we have:

Tan θ = $\frac{opposite}{adjacent}$

          = $\frac{11}{4}$

Tan θ = 2.75

θ = $Tan^{-1}$ 2.75

  = 70.0169

θ = $70^{o}$

Considering triangle formed by the tower and the stake to determine the value of l, we have;

Cos θ = $\frac{adjacent}{hypotenuse}$

Cos $70^{o}$  = $\frac{23}{l}$

l = $\frac{23}{Cos 70^{o} }$

 = $\frac{23}{0.3420}$

l = 67.2515

l = 67 feet

The length of the guy wire is 67 feet.

For more on trigonometric, check: brainly.com/question/6459892