The angle of elevation of a cloud from a point h metres above a lake is ẞ. The angle of depression of its reflection in the lake is 45 deg The height of location of the cloud from the lake is
(1) (h(1 + tan beta))/(1 - tan beta)
(2) (h(1 - tan beta))/(1 + tan beta)
(3) h tan(45 deg - beta)
(4) none of these