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please-prove-it-cos-x-J-0-x-2-x-1-1-x-J-2n-x-




Question Number 97506 by ali_golmakani last updated on 08/Jun/20
please prove it    cos x= J_0 (x) + 2Σ_(x−1) (−1)^x J_(2n) (x)
pleaseproveitcosx=J0(x)+2x1(1)xJ2n(x)

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