Report - Exerc´ıcios - alunospgmat.ufba.brCDI-II).pdf · φ(α)=0 eφ(β)=a acosα=0 acosβ= a cosα=0 cosβ=1 donde vem α= π 2 eβ=0 Portanto, desse modo, obteremos a quarta parte da

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