While standing on top of a hill at a ski resort, Alexa Latour spots the ski lodge below. If the vertical height of the hill is 1209 feet and the angle of depression is 53°, what distance must Alexa ski in order to reach the lodge? Round to the nearest foot.

Respuesta :

Answer: The distance to the lodge is 1514 ft

Step-by-step explanation: Please refer to the diagram attached.

The point where Alexa is standing at the top of the hill is marked as point A. The vertical height of the hill is from point A to point B which has been given as 1209 ft. Also, when Alexa looks down, she does that at an angle of depression measuring 53 degrees. Therefore while looking at the lodge, she forms an angle between her line of sight and the height of the hill. That angle is calculated as 90 degrees minus 53 degrees and that equals 37 degrees (as shown in the diagram). Note that her line of sight is AC since the ski lodge is at point C. Therefore the distance she must ski in order to get to point C (which shall be represented by X) shall be calculated using trigonometric ratios.

Note that we have a reference angle which is 37. We also have an adjacent which is 1209 (the side that lies between the reference angle and the right angle). And then we want to calculate the hypotenuse, yet unknown, (which is the side facing right angle). Since we have an adjacent, a hypotenuse and the reference angle, X can be calculated as

Cos A = Adjacent/Hypotenuse

Cos A = AB/AC

Cos 37 = 1209/X

By cross multiplication we now have X = 1209/Cos 37

By using our calculator or checking the table of values, Cos 37 = 0.7986

X = 1209/0.7986

X = 1513.899

Approximated to the nearest feet,

X = 1514 ft

Ver imagen micahdisu

Alexa have to walk about 911.05ft to reach the ski lodge.

Data;

  • Vertical height = 1209 ft
  • angle of depression = 53°
  • horizontal distance = x

Horizontal Distance

To calculate the horizontal distance between the ski lodge and the hill, we can use trigonometric ratio SOHCAHTOA.

In this situation, we have the value of opposite and angle while we need to find the adjacent side to the angle.

Using the tangent of this angle, we can solve for this.

[tex]tan \theta = \frac{opposite}{adjacent} \\tan 53 = \frac{1209}{x}\\ x = \frac{1209}{tan 53}\\ x = 911.05ft[/tex]

From the calculation above, Alexa have to walk about 911.05ft to reach the ski lodge.

Learn more on trigonometric ratio here;

https://brainly.com/question/24349828

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