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calculate-k-0-n-1-C-n-k-cos-2-kpi-n-n-2-




Question Number 92769 by mathmax by abdo last updated on 09/May/20
calculate Σ_(k=0) ^(n−1)  C_n ^k  cos^2 (((kπ)/n))     (n≥2)
calculatek=0n1Cnkcos2(kπn)(n2)

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