question_answer

If the angle of elevation of a cloud from a point h metres above a lake is \[\alpha \] and the angle of depression of its reflection in the lake is \[\beta \], What is the distance of the cloud from the point of observation? (in ?m?)

A)  1                                

B)  \[\frac{h(tan\,\beta -tan\,\alpha )}{\tan \,\beta +\tan \,\alpha }\]

C)  \[\frac{h(tan\,\beta +tan\,\alpha )}{\tan \,\beta -\tan \,\alpha }\]    

D)  None of these