
To find: The shortest distance d of the helicopter to travel to the land as shown in the figure.

Answer to Problem 3PS
w=2183.05 is the shortest distance.
Explanation of Solution
Given information:
The diagram is mentioned in the problem in which perpendicular is 3000ft and the shortest distance is w .
Formula:
tanθ=perpendicularbase=pb .
Calculation:
Consider the statement that the shortest distance d of the helicopter would have to travel to land on the island.
Recall that the tanθ=perpendicularbase=pb where perpendicular is 3000ft and base is x+w and θ=270 .
Therefore tan270=3000x+w⇒0.5095=3000x+w⇒x+w=30000.5095=5888.12 .
Therefore x+w=5888.12 .
Now tan390=3000x⇒0.8097=3000x⇒x=30000.8097=3705.07 .
Therefore x=3705.07 .
Therefore the shortest distance is x+w=5888.12⇒3705.07+w=5888.12⇒w=5888.12−3705.07=2183.05 .
Therefore w=2183.05 the shortest distance.
Chapter 4 Solutions
Precalculus with Limits
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