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Let 10 vertical poles standing at equa...

Let 10 vertical poles standing at equal distances on a straight line , subtend the same angle of elevation `alpha` at a point O on this line and all the poles are on the same side of O. If the height of the longest pole is h and the distance of foot the smallest pole form O is `alpha` then the distance between two consecutive poles, is

A

`(h sin alpha + a cos alpha)/(9 sin alpha)`

B

`(h cos alpha - a sin alpha)/(9 cos alpha)`

C

`(h cos alpha - a sin alpha)/(9 sin alpha)`

D

`(h sin alpha + a cos alpha)/(9 cos alpha)`

Text Solution

Verified by Experts

The correct Answer is:
C
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