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    Analytic functions

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    Please see the attachment

    Using the Pythagorean theorem (see attached) and knowing the sinz and cosz are analytic functions. What can we say about (see attached)

    Show that cos(A+B)=cosAcosB-sinAsinB using exponential expressions for sin and cos

    What are the zeros of

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    Please see the attachment.

    We note , . Then we have

    So we ...

    Solution Summary

    This shows how to use the Pythagorean theorem to work with trigonometric analytic functions.