A commercial jet aircraft has a mass of 150 Mg and is cruising at a constant speed of 85...

A commercial jet aircraft has a mass of 150 Mg and is cruising at a constant speed of 850 km/h in level flight (θ = 0°). If each of the two engines draws in air at a rate of 1000kg/s and ejects it with a velocity of 900 m/s, relative to the aircraft, determine the maximum angle of inclination θ at which the aircraft can fly with a constant speed of 750 km/h. Assume that air resistance (drag) is proportional to the square of the speed, that is, where c is a constant to be determined. The engines are operating with the same power in both cases. Neglect the amount of fuel consumed.