The solution set of the system of equation \[x+y=2\pi /3,\] \[\cos x+\cos y=3/2,\] where x and y are real, is

\[x=n\pi ,y=\frac{\pi }{3}-n\pi \]

\[x=\frac{\pi }{3}-n\pi ,y=n\pi \]

The solution set of the system of equation \[x+y=2\pi /3,\] \[\cos x+\

1.	The solution set of the system of equation \[x+y=2\pi /3,\] \[\cos x+\cos y=3/2,\] where x and y are real, is
A.	\[x=\frac{\pi }{3}-n\pi ,y=n\pi \]
B.	\[\phi \]
C.	\[x=n\pi ,y=\frac{\pi }{3}-n\pi \]
D.	None of these
Answer» C. \[x=n\pi ,y=\frac{\pi }{3}-n\pi \]

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The solution set of the system of equation \[x+y=2\pi /3,\] \[\cos x+\cos y=3/2,\] where x and y are real, is

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