Tue April 03, 2012 By: Minu Joseph

the angle of elevation of a cloud from a point 'h' metres above a lake is 'theta'.the angle of depression of its reflection in lake is 45 degree.the height of the cloud is- (A)h tan(45+theta) (B)h cot(45-theta) (c)h tan(45-theta) (d)h cot(45+theta)

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Tue April 03, 2012
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