the value of 10summation k=1 (sin2kpi/11 + icos2kpi/11) is (a) 1 (b) -1 (c) -i (d) i

the value of 10summation k=1 (sin2kpi/11 + icos2kpi/11) is

(a) 1                            (b) -1

(c) -i                         (d) i




1 Answers

Aman Bansal
592 Points
10 years ago

Dear Ranjita,

Express the given equation in polar co-ordinates then afetr applying formula for GP you can get the answer..

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Aman Bansal

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