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sreesuja
Average Member

India
13 Posts

Posted - 03/23/2011 :  00:01:12  Show Profile  Reply with Quote
Please help me out with this 2 sums

1)

The angle of elevation of a cloud from point h metres above the surface of a lake is and the angle of depression of its reflection in the lake is . Prove that the height of the cloud above the lake is
h(tan +tan )(tan -tan )
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