If \[{{\cos }^{6}}\alpha +{{\sin }^{6}}\alpha +K\,{{\sin }^{2}}2\alpha – McqOptions

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1.	If \[{{\cos }^{6}}\alpha +{{\sin }^{6}}\alpha +K\,{{\sin }^{2}}2\alpha =1,\] then K =
A.	\[\frac{4}{3}\]
B.	\[\frac{3}{4}\]
C.	\[\frac{1}{2}\]
D.	2
Answer» C. \[\frac{1}{2}\]

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