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if a(1), a(2) , a(3),"……",a(n) are in A....

if `a_(1), a_(2) , a_(3),"……",a_(n)` are in A.P. with common difference d, then the sum of the series `:`
`sin d [coseca_(1) coseca_(2) + cosec a_(2) cosec a_(3) + "…."cosec a_(n-1) cosec a_(n)]` is `:`

A

`sec a_(1) - sec a_(n)`

B

`cosec a_(1) - cosec a_(n)`

C

`cot a_(1) - cot a_(n)`

D

`tan a_(1) - tan a_(n)`

Text Solution

Verified by Experts

The correct Answer is:
C
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