Question

To approach a runaway a plane must be 7 descent starting from the height of 3 miles above the ground. How many miles from the runaway is the airplane at the start of this approach

Answer 1

use SOHCAHTOA 

S = sine

O = opposite edge

H = hypotenuse

T = Tangent

A = adjacent edge

C = cosine.

The extreme is where the runaway is indicated by the hypotenuse is the required distance. Therefore,

sine 7= 3/H

H = 3/sine 7= 24mi