Question

A vertical tower stands on horizontal plane and
is surmounted by a vertical flagstaff of height
h metre. At a point on the plane, the angle of
elevation of the bottom of the flagstaff is a
and that of the top of flagstaff is B. Prove that
the height of the tower is
h tan a
tan ß - tan a
.​

Answer 1

hope this will help you... hence it is proved