New stalling speed
@Shabez
1) New stalling speed = (Normal Stalling speed) x square root (Loadfactor)
2) Load factor varies as the secant of the bank angle.
Given, stalling speed at 10 degree bank angle is 60kts
Therefore, Loadfactor at 10 degree bank angle is sec10, i.e 1/cos10 = 1.015
Substituting in 1), the normal stalling speed (without any bank) is 59.54kts
Load factor at 45 deg bank angle is sec45, i.e 1/cos45 = 1.414
Stalling speed at 45 deg bank = 59.54 x square root (1.414) = 70.8kts
Hope this helps.