B9. Evaluate the following integrals by substituting z = e^iθ to obtain contour integrals, then use the residue theorem.
(i) ∫sin 2θ cos 4θ dθ 0--> 2 pi
(ii) ∫sin^2 θ cos^4 θ dθ 0 --> 2pi
B10. Evaluate the integral ....by contour integration.
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Contour Integrals and Residue Theorem are investigated. The solution is detailed and well presented.