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
