Question

From a point at the height H above the surface of lake the angle of elevation and the depression of the top of the temple and its reflection in the lake are alpha and beta respectively . prove that the height of top of the temple above the lake is h(cot alpha + cot beta)/cot alpha -- cot beta

And solve that which you know

Answer 1

In triangle ABC, let D be the midpoint of BC .if angle ADB is equal 45 and angle ACD is equal 30 determine angle bad