How to do this math problem?

(1)AD is the diameter, perpendicular to the chord BE.

Then, AD is the middle vertical line of BE.

∴∠EBD=∠BED

∠∠BAD =∠BED (circumferential angle on the same arc)

∴∠BAD=∠EBD

②∫AD is the diameter of the circle.

∴∠ABD=90

∴∠BED=90 -∠ACD=48

∴∠BAD=48