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If the angles of elevation of the top of tower from three collinear points `A`, `B` and `C`, on a line leading to the foot of the tower, are `30^(@)`, `45^(@)` and `60^(@)` respectively, then the ratio , `AB : BC` is

A

`1 : sqrt3`

B

`2:3`

C

`sqrt3:1`

D

`sqrt3:sqrt2`

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The correct Answer is:
C
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DISHA PUBLICATION-TRIGONOMETRIC FUNCTIONS -EXERCISE-2
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