5. Use the Cauchy-Riemann equations to show that neither \sin \bar{z} nor \cos \bar{z} is analytic function of z anywhere.
Added by Juan Jos- W.
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For a function f(z) = u(x, y) + iv(x, y), where z = x + iy, the Cauchy-Riemann equations are: du/dx = dv/dy du/dy = -dv/dx Show more…
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