1.

\[\frac{{{(\cos \theta +i\sin \theta )}^{4}}}{{{(\sin \theta +i\cos \theta )}^{5}}}\] is equal to [MNR 1985; UPSEAT 2000]

A. \[\cos \theta -i\sin \theta \]
B. \[\cos 9\theta -i\sin 9\theta \]
C. \[\sin \theta -i\cos \theta \]
D. \[\sin 9\theta -i\cos 9\theta \]
Answer» E.


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