1. The problem statement, all variables and given/known data A plane flying at a constant velocity v (parallel to x-axis) at a height h = 8 km is being tracked by a radar located at origin. if the angle A is decreasing at the rate of 0.025 rad/s, the velocity of the plane when A = 60 degrees is: (A is the angle made by the position vector of plane with the x-axis) a) 1440 km/h b) 960 km/h c) 1920 km/h d) 480 m/h 2. Relevant equations vt = h cot A differentiating w.r.t t (time): v = h cosec2 A (0.025) -------eqn 1 = 0.27 km/h 3. The attempt at a solution the answer is nowhere near what one would expect. also, if v is consatant then how can it depend on A? (eqn 1) Where am i going wrong?