Question 17The angle of depression of two points A and B on a plane field from the top of a mast erected between A and B are 30° and 45° respectively. If A is westward of B, find IABI if the height of the mast is 15m from the field A.15√3 mB.5(3 +√3)mC.15(1 + √3)mD.5(√3 - 1) Objective Show full explanation