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| PAGE: 466 | SET: Exercises | PROBLEM: 1 |
Draw a figure from the given data.
Since pilot wants to take the plane up to 20000 ft over the next 50 miles,
BC = 10000 ft, and AB = 50 miles.
Convert 50 miles into feet 
or 264000 ft.
Angle of elevation is measure of A.
Use tangent ratio to find 
.
(Substitute 
)
A equals to invese tan of 
.
Use a calculater.
The angle of elevation of pilot to take the plane up over 20000 ft is nearly 
.
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