The angle of elevation of a cloud from a...

The angle of elevation of a cloud from a point h metres above a lake is `beta`. The angle of depression of its reflection in the lake is `45^(@)`. The height of location of the cloud from the lake is

`(h(1+tanbeta))/(1-tanbeta)`

`(h(1-tanbeta))/(1+tanbeta)`

`htan(45^(@)-beta)`

None of these

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