Question

Cleqslant%20%20%5Ctimes%20%20%5Cleqslant%20%20%7C%20" id="TexFormula1" title="obtain the fourier expansion for sin ax in the interval - | \leqslant \times \leqslant | " alt="obtain the fourier expansion for sin ax in the interval - | \leqslant \times \leqslant | " align="absmiddle" class="latex-formula">
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Answer 1

I really do not get it . It’s this a question ? If so can you be a little more specific .