Does repentance count for someone who used to show a little of her hair from under her hijab and has repented from that, but has not repented from wearing pants and the like in front of her mahrams, knowing the ruling on wearing pants?

A Muslim must repent from all sins. Repentance from one sin, while persisting in another of a different kind, is acceptable, such as repenting from usury while not repenting from alcohol. However, if the two sins are of the same kind, such as a woman ceasing to uncover her hair (part of immodest display) while insisting on wearing tight trousers in front of her mahrams, then this repentance is not considered sincere and may not be accepted by some scholars. A woman is permitted to wear loose-fitting trousers that are neither revealing nor transparent in front of women and her mahrams.