Please Help

[Khosrow]

Hi!
Please ladies and gentlemen, I poster my question
yesterday, down here. Someone helps please! I appreciate
it. Thanks.

 

[Lebesgue]

Someone answered this in 'General' part of w2k's NG.
And I think the answer is:
f(x)=a sin*n (mx+py) + b cos*q (px+my)
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