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Homework answers / question archive / In a given a polar frame ( r , θ )
In a given a polar frame ( r , θ ). For R^2, derive the polar form of the following:
1) the gradient of a scalar field, (i.e. grad(f)= (df/dr) e_r + (1/r df/dθ) e_θ )
2) the divergence of a vector field V=V_r e_r + V_θ e_θ, (i.e. div (V)= dV_r/dr + V_r/r + 1/r dV_θ/d_θ )
3) the e3 component of the curl of V, ω_3 = ω dot e3 = 1/r dV_r/d_θ - dV_θ/dr