Question: Hello. Please help. Thank you. a (7) Using the definition of derivative prove that d(f) does not exist anywhere. [5] (8) State the necessary and

Hello. Please help. Thank you.

a (7) Using the definition of derivative prove that d(f) does not exist anywhere. [5] (8) State the necessary and sufficient conditions for a function being analytic. Hence show that the functions sin(z) and cos(z) are both analytic. [5]

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