I am completely lost and all my results are INcorrect!
1)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 22.
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.
ESPECIALLY THIS ONE!!!
2)The reference angle of 12/5pi radians is ???radians.
The reference angle of -6/10 radians is ????
'radians.
The reference angle of 7/5pi radians is ??? radians.
2007-11-15 15:40:16 · 3 answers · asked by KYLE B 2 in Science & Mathematics ➔ Mathematics
sin22 = 31000/d
d = 31000/sin22 = 82753
tan22 = 31000/x
x = 31000/tan22 = 76728
is reference angle just the same angle 0
7/5pi = 3/5pi
2007-11-15 15:49:26 · answer #1 · answered by norman 7 · 0⤊ 0⤋
I think you need to start drawing pictures of whats going on. Let the airplane be a point A, some 31000 feet above the ground, which is at point B on the ground. The airport is at point C. The triangle ABC is a right triangle with the right angle at B. From where the pilot is looking straight ahead, the angle to the hypotenuse (AC) is 22 degrees. The hypotenuse is the distance from the plane to the airport. BC is the distance from the ground point to the airport. If you had geometry, angle C is also 22 degrees (alternate interior angles of a line drawn thru 2 parallel lines)
2007-11-15 15:55:27 · answer #2 · answered by cattbarf 7 · 0⤊ 0⤋
Your basically trying to square the circle although it looks solvable.
2007-11-15 15:49:30 · answer #3 · answered by Anonymous · 0⤊ 1⤋