What is the real part of \[{{(\sin x+i\cos x)}^{3}}\]where\[i=\sqrt{-1

1.	What is the real part of \[{{(\sin x+i\cos x)}^{3}}\]where\[i=\sqrt{-1}\] ?
A.	\[-\cos \,3x\]
B.	\[-\sin \,3x\]
C.	\[\sin \,3x\]
D.	\[\cos \,3x\]
Answer» C. \[\sin \,3x\]

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What is the real part of \[{{(\sin x+i\cos x)}^{3}}\]where\[i=\sqrt{-1}\] ?

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