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laila [671]
3 years ago
8

a guy wire for a tree is 20 ft long, making a 21 angle with the ground. How far is the base of the tree from a stake anchoring t

he wire?
Mathematics
1 answer:
evablogger [386]3 years ago
8 0

Answer:

18.7 feet far

Step-by-step explanation:

Based on the information given we can conclude that our set up will be a Right triangle (i.e. one angle is 90°), where the hypotenuse will be denoted by the guy wire of 20ft  and angle of 21° is the angle formed between then hypotenuse and the base (i.e. ground).

Thus we want to find the base length (lets call it x ) of this triangle, so we can use trigonometry as we have one angle and the hypotenuse, as follow:

cos(21)=\frac{adjacent side}{hypotenuse}=\frac{baselength}{guywire}\\\\ cos(21)=\frac{x}{20} \\x=20cos(21)\\x=18.671\\x=18.7ft

So the base is approximately 18.7 feet far from the tree of the anchored wire.

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