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If a1, a2,....an are in AP with common difference d,then find the sum of the series: sind[coseca1coseca2+coseca2coseca3...cosecan-1cosecan]

+5 votes
800 views
asked Aug 19, 2016 in Mathematics by Rahul Roy (7,955 points)

1 Answer

+4 votes
answered Aug 19, 2016 by Annu Priya (19,717 points)
selected Dec 5, 2016 by sarthaks
 
Best answer

Given: a1,a2,a3..........an are in AP with d as common difference.

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