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A 21-foot ladder is leaning against a building. The base of the ladder is 7 feet from the base of the building.


To the nearest degree, what is the measure of the angle that the ladder makes with the ground?

A 21-foot ladder is leaning against a building. The base of the ladder is 7 feet from the base of the building. To the nearest degree, what is the measure of th class=

Verified Answer :

x - the measure of the angle that the ladder makes with the ground

\(\cos{x}= \frac{7}{21} \\ \\ \cos{x}= \frac{1}{3} \\ \\ x=\arccos{\frac{1}{3} } \approx 71^o\)

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