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27 February, 02:40

Write the sum without sigma notation. then evaluate. summation from k equals 1 to 5 cosine k pi

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  1. 27 February, 02:59
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    summation from k equals 1 to 5 cosine k pi

    = Cosine 1*∏ + Cosine 2*∏ + Cosine 3*∏ + Cosine 4*∏ + Cosine 5*∏

    = - 1 + 1 + - 1 + 1 + - 1

    = - 1
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