If a1, a2, a3, ..... , an are in AP witn common difference d (where d + 0) then the sum of series : sin d (cosec a1 cosec a2 + cosec a2 cosec a3 + ... + cosec an - 1 cosec an) is equal to cot a1 - cot an
If a1, a2, a3, ..... , an are in AP witn common difference d (where d + 0) then the sum of series : sin d (cosec a1 cosec a2 + cosec a2 cosec a3 + ... + cosec an - 1 cosec an) is equal to cot a1 - cot an
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:If a1, a2, a3,
, an are in AP wiun common difference d (where d + 0) then the sum of
......
series :
is
equal
to
sin d (cosec a1 cosec a2 + cosec a2 cosec a3 +... + cosec an - 1 cosec an)
cot a1 - cot an
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