Complex Analysis Basedon Demoivre'stheorem, the given below isequi valent to which Q thefollowing? 15( cos 30°+ i sin 30CoSa. 6a5 ( cos j20° ti sin i20)b. 625 (cos 810000° + i sin 18000)c. 20( cos 20° +' sin 20a. 0 ( cos |20°+isin 120°)

Let , z = 5cos 30° + sin 30° which is in polar form of complex number. Compare with , z = r cos θ +…

Answered: d. 20 ( cos 120° +isin 120°) Based on…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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d. 20 ( cos 120° +isin 120°) Based on De moi vre's theorem, the given below is equi valent to whi ch the following? s (cos 30°+ isin 30 CoS a. 625 (co cosjao° ti sin i20) b. 625 (cos 810000° + i sin 18009 c. 20( cos 20' t' sin 2o°)