### Integrate [ (1 + cos^2x)/(cos^2x)] from 0 to Pi/4

Integrate [ (1 + cos^2x)/(cos^2x)] evaluate from 0 to Pi/4

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Integrate [ (1 + cos^2x)/(cos^2x)] evaluate from 0 to Pi/4

Hi, I've attached 2 questions in one file. Thanks. Question 1 hints: Hint 1: you have a process Y and a function, the first instinct should be to try Ito. Hint 2: what would the SDE of a martingale look like? Look at attached lecture note. Question 2 hint: Hint: use the integral version of Ito's formula.

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Integration - [See attachment for equations.]

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See attachment for equation

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Improper Integrals of Certain Functions over (- infinity, infinity) Please check attached file. Please provide the detailed explanation. Let f(z)=P(z)/Q(z) be a rational function where...

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See attached

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