`alpha ` is a root of equation `( 2 sin x - cos x ) (1+ cos x)=sin^2 x , beta ` is a root of the equation ` 3 cos 2x - 10 cos x +3 =0 and gamma ` is a root of the equation `1-sin2 x = cos x- sin x : 0 le alpha , beta, gamma , le pi//2 ` ` cos alpha + cos beta + cos gamma ` can be equal toA. `(3sqrt(6)+2sqrt(2)+6)/(6sqrt(2))`B. `(3sqrt(3)-8)/(6)`C. `(3sqrt(3)+2)/(6)`D. None of these

`alpha ` is a root of equation `( 2 sin x - cos x ) (1+ cos x)=sin^2 x

1.	`alpha ` is a root of equation `( 2 sin x - cos x ) (1+ cos x)=sin^2 x , beta ` is a root of the equation ` 3 cos 2x - 10 cos x +3 =0 and gamma ` is a root of the equation `1-sin2 x = cos x- sin x : 0 le alpha , beta, gamma , le pi//2 ` ` cos alpha + cos beta + cos gamma ` can be equal toA. `(3sqrt(6)+2sqrt(2)+6)/(6sqrt(2))`B. `(3sqrt(3)-8)/(6)`C. `(3sqrt(3)+2)/(6)`D. None of these
Answer» Correct Answer - A

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