A tower T is observed from two points A and B which are 240 metres apart. The angle TAB is found to be 57degree and the angle TBA is 78degree. Find the distance of the tower from A.

Answer 1

You say angle TBA = 78°
This is only possible if A and B are on opposite sides of the tower.
Confirm this before I solve it.

Answer 2

A and B are on the opposite side of tower.