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If a1,a2,a3,...an are in A.P with common...

If `a_1,a_2,a_3,...a_n` are in A.P with common difference `d` then find the sum of the following series `sind(coseca_1coseca_2+coseca_2coseca_3+....coseca_(n-1)coseca_n)`

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

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The correct Answer is:
C
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