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**Hello everyone**first time here. don't know if it's the correct group... Am having some issues wiz my maths homework that going to count as a final assessment. Really Really need help.

The function (f), with a period of 2π is : f(x) = cosh(x-2π) if x [π;3π]..

I had to do a graph as the first part for the interval of [-π;5π] so that part is ok.

**PLEASE HELP WITH THE OTHER ISSUES...**

NOTE: cosh x =(e^x + e^-x)/2

NOTE: cosh x =(e^x + e^-x)/2

1st - Have to find out if the function is an odd or even parity... i worked it out and my answer is an even parity... But since i like to cross check(before moving on the next part) on the online calculator, it says that the function is neither odd nor even...

**Can someone pleasez help and then tell me How to proceed for the Fourier complex form of the function (f) if the answer is neither odd or even?**

2nd - Have to find out about the Fourier complex form of the function (f).. Since i found it

__even parity__so i used those function as seen in the picture. For

**i already did it, for the**

*ao***please help wiz the integration by parts... The**

*an*__T__in the formula i replaced by 2pi... Is it the correct way to do it?

3rd - The Part Four in Roman Numeral(iv), that a total black out for me

PLZ PLZ PLZ really need help...