Find the Fourier cosine coefficients of
the Fourier sine series of e^x. Differentiating again yields
Since equations 1 and 3 both give Fourier cosine series of e^x, they must be identical. Thus,
Can anyone please explain step by step what is wrong with this? I'm supposed to correct the mistakes and then find without using the typical technique but I'm so confused!
Any mistakes at all you can see, please point them out!
Thanks in advance