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from her eye, which stands 1.75 meters above the ground, khadija measur…

Question

from her eye, which stands 1.75 meters above the ground, khadija measures the angle of elevation to the top of a prominent skyscraper to be 15°. if she is standing at a horizontal distance of 209 meters from the base of the skyscraper, what is the height of the skyscraper? round your answer to the nearest tenth of a meter if necessary.

Explanation:

Step1: Usar la función trigonométrica tangente

En un triángulo rectángulo, \(\tan\theta=\frac{\text{opuesto}}{\text{adyacente}}\). Aquí, \(\theta = 15^{\circ}\), el cateto adyacente \(a = 209\) metros y el cateto opuesto es \(x\). Entonces, \(\tan(15^{\circ})=\frac{x}{209}\).

Step2: Calcular el valor de \(x\)

Sabemos que \(\tan(15^{\circ})=2-\sqrt{3}\approx0.2679\). Despejando \(x\) de la ecuación \(\tan(15^{\circ})=\frac{x}{209}\), obtenemos \(x = 209\times\tan(15^{\circ})\). Sustituyendo el valor de \(\tan(15^{\circ})\), \(x=209\times0.2679 = 56.0\) (aproximadamente).

Step3: Calcular la altura total del rascacielos

La altura total \(h\) del rascacielos es la suma de la altura de la vista de Khadija (\(1.75\) metros) y \(x\). Entonces, \(h=x + 1.75\). Sustituyendo \(x = 56.0\), \(h=56.0+1.75=57.8\) metros.

Answer:

La altura del rascacielos es \(57.8\) metros.