question_answer

If the angle of depression and elevation of the top of a tower of height 'h' from the top and bottom of a second tower are x and y respectively, find the height of the second tower.

A) \[h(\cot y-\cot x)\]

B) \[h(\tan x+\tan y)\]

C) \[h(1+\tan x\cot y)\]

D) \[h(\tan y.\cot x+1)\]