1.

From the top of a hill h metre high, the angles of depressions of the top and the bottom of a pillar are alpha and beta, respectively. The height (in metres) of the pillar is

Answer»

`(H(TANBETA-tanalpha))/(tanbeta)`
`(h(tanalpha-tanbeta))/(tanalpha)`
`(h(tanbeta+tanalpha))/(tanbeta)`
`(h(tanbeta+tanalpha))/(tanalpha)`

ANSWER :A


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