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Neko [114]
3 years ago
13

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

Mathematics
1 answer:
vodka [1.7K]3 years ago
3 0
X - <span>the measure of the angle that the ladder makes with the ground

</span>\cos{x}= \frac{7}{21} &#10;\\&#10;\\ \cos{x}= \frac{1}{3} &#10;\\&#10;\\ x=\arccos{\frac{1}{3} } \approx 71^o<span>
</span>
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