Question 189135
after flying at an altitude of 500 meters , a helicopter starts to descend wheni it ground distance fron the landing pad is 11 kilometers . What is the angle of depression?
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500 meters is (1/2) km
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Draw the picture:  The height is (1/2)km ; the length is 11 km.
The angle of depression = inversetan[(1/2)/11] = inversetan(1/22) = 2.6 degrees
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Cheers,
Stan H.