Cauchy's Theorem and the Cauchy-Goursat Theorem 4.60. Verify Cauchy's theorem for the functions (a) 3z2 +...

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Cauchy's Theorem and the Cauchy-Goursat Theorem 4.60. Verify Cauchy's theorem for the functions (a) 3z2 + iz – 4, (b) 5 sin 2z, (c) 3 cosh(z+ 2) where C is the square with vertices at 1 + i, -1 + i. Cauchy's Theorem and the Cauchy-Goursat Theorem 4.60. Verify Cauchy's theorem for the functions (a) 3z2 + iz – 4, (b) 5 sin 2z, (c) 3 cosh(z+ 2) where C is the square with vertices at 1 + i, -1 + i.