5.19. In this problem f(z) = P and R > 1. Modify our computations in Example 5.14 as follows. exp(iz) z²+1 YR (b) Show that |exp(iz)| < 1 for z in the upper half plane, and conclude that |f (z)| < for sufficiently large |z|. -R R (c) Show that limr→∞ = 0 and hence limr-00 Si f = %. -R,R] (d) Conclude, by just considering the real part, that cos(x) dx = e -00

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A:

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A:

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A: I am going to solve the given problem by using some simple algebra to get the required result.

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A:

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A: A, B, C are coplanar.So

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