a plane flying at 33,000 feet is 13o miles away from the airport when it begins to descent.find the angleof depression of the plane to the starting point of the airport

1 answer

Draw the diagram. It should be clear that if the 130 miles is along the ground, then
tanθ = (33000/5280) / 130

Otherwise, if the 130 miles is line-of-sight,
sinθ = (33000/5280) / 130