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Hi,
What is the derivation of formula for sum of sine/cosine series, the angles of which are in A.P.?
Thanks,
Nishtha
Dear nishtha,
sin ( π + θ ) = –sinθ and sin (2π + θ ) = sinθ
... –sin (α + β) = sin(π + )
...
so on. Using these results, required sum is
S=sin α+ … to n terms
= sin α + sin ... to n terms
We are all IITians and here to help you in your IIT JEE preparation. All the best. If you like this answer please approve it.... win exciting gifts by answering the questions on Discussion Forum Sagar Singh B.Tech IIT Delhi
We are all IITians and here to help you in your IIT JEE preparation. All the best.
If you like this answer please approve it....
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Sagar Singh
B.Tech IIT Delhi
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