If \[\]\[x+\frac{1}{x}=2\cos \theta ,\] then x is equal to [RPET 2001]

1.	If \[\]\[x+\frac{1}{x}=2\cos \theta ,\] then x is equal to [RPET 2001]
A.	\[\cos \theta +i\,\sin \theta \]
B.	\[\cos \theta -i\,\sin \theta \]
C.	\[\cos \theta \pm i\,\sin \theta \]
D.	\[\sin \theta \pm i\,\cos \theta \]
Answer» D. \[\sin \theta \pm i\,\cos \theta \]

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If \[\]\[x+\frac{1}{x}=2\cos \theta ,\] then x is equal to [RPET 2001]

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