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If f(x)=sin^2x+sin^2(x+pi/3)+cosxcos(x+p...

If `f(x)=sin^2x+sin^2(x+pi/3)+cosxcos(x+pi/3)a n dg(5/4=1,` then `(gof)(x)` is ____________

A

a circle

B

a straight line

C

a parabola

D

none of these

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