An airplane flies at an altitude of 5mies toward a point directly over an observer. The speed of the plain is 600 miles per hour. Find the rate at which the angle of elevation thetha is changing when the angle is 75 degrees.

Question

Please help with this question.

bobpursley · Answer

Plain or plane
theta or thetha
miles or mies

What angle? Is it the angle of elevation?

Then if angle of elevation, vertical is 5miles, horizontal is 5cos75

horizontal= 5cosTheta
dh/dt= -5sin Theta dTheta/dt
600=-5sin75 dtheta/dt
solve for dTheta/dt

Claire · Answer

Plain θ miles