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The solutions of the system of equations `x+y=2pi//3` and `cos x + cos y = 3//2` where x and y are real, are

A

`x=-(pi)/(3),y=pi`

B

`x=pi,y=-(pi)/(3)`

C

`x=pi,y=(pi)/(2)`

D

solution doesn't exist

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The correct Answer is:
D
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AAKASH SERIES-TRIGONOMETRIC EQUATIONS-Exercise-II
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  13. If alpha and beta are two different solutions lying between -(pi)/(2)...

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