Let $D=\{z\in\mathbb{C}:|z|<1 \}$. How to compute the integral : $$\int_{+\partial D}\frac{z}{\sin^{3}(z/2)}dz$$ without using Laurent series?
My trouble is that I cannot find the poles and the residues.
2026-03-27 02:35:24.1774578924
Compute $\oint_{S^1}\frac{z}{\sin^{3}(z/2)}dz$ without using Laurent series
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