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### Flying a Kite

```
Date: 5/23/96 at 19:50:29
From: Duvall
Subject: Angle of elevation of a kite

A boy flying a kite is standing 30 ft from a point directly under the
kite.  If the string to the kite is 50 ft. long, find the angle of
elevation of the kite.

What is the angle of elevation of the sun when a tree 6.25 m tall
casts a shadow 10.1 m long?
```

```
Date: 5/28/96 at 15:53:41
From: Doctor Ethan
Subject: Re: Angle of elevation of a kite

Hello,

First a picture.

&    <-Kite
&&&
/&|
/  |
/   |
50ft/    |
/     |
/      |
You------point
30ft

Okay Now we want the values for A deg.

Since in a right triangle the cosine of an angle is the
ratio of the adjacent side over the hypotenuse,

cos (A) = 30/50 = 3/5

Now just use a calculator to find A.

-Doctor Ethan,  The Math Forum
Check out our web site!  http://mathforum.org/dr.math/
```
Associated Topics:
High School Trigonometry

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