Question: Given the flux density D = 16/r cos(2) a C/m 2 , use two different methods to find the total charge within the region

Given the flux density D = 16/r cos(2θ) a_θ C/m², use two different methods to find the total charge within the region 1 < r < 2 m, 1 < θ < 2 rad, 1 < ϕ < 2 rad.

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