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Mathematics 7 Online
OpenStudy (anonymous):

what is the solution to this in terms of n? 1 + cos (4x) + cos(8x) + cos(12x)....+ (cos nx).

OpenStudy (anonymous):

someone please tell me the answer to what is the solution to this in terms of n? 1 + cos (4x) + cos(8x) + cos(12x)....+ (cos nx).

OpenStudy (anonymous):

to have a solution we need an equation.... and I dont see any equation given

OpenStudy (anonymous):

\[=1+\sum_{i=1}^{\infty}cos(4ix)\]

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