SOLUTION: If sinx=1/3 and sec y=5/4, where x,y lie between 0 and pi/2, evaluate cos(x+y)= 2)A plane is flying at an elevation of 31000 feet. It is within sight of the airport and

Question 1047036: If sinx=1/3 and sec y=5/4, where x,y lie between 0 and pi/2, evaluate
cos(x+y)=

2)A plane is flying at an elevation of 31000 feet.
It is within sight of the airport and the pilot finds that the angle of depression to the airport is 20 ^\circ.
Find the distance between the plane and the airport.

Find the distance between a point on the ground directly below the plane and the airport.

Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!

2)A plane is flying at an elevation of 31000 feet.
It is within sight of the airport and the pilot finds that the angle of depression to the airport is 20 ^\circ.
=====
IDK what that means.
Find the distance between the plane and the airport.

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