An aeroplane carries out a descent from FL 410 to FL 270 at cruise Mach number, and from FL 270 to FL 100 at the IAS reached at FL 270.How does the angle of descent change in the first and in the second part of the descent? Assume idle thrust and clean configuration and ignore compressibility effects.

Question 123, Performance - ATPL - Airline Transport Pilot license

Increases in the first part

is constant in the second.

Is constant in the first part

Decreases in the second.