The range of `cos^2 (2pi / 3 - x ) + cos^2 ( 2 pi / 3 + x)` is

The value of cos^(2)x + cos^(2) (pi/3 + x) - cos x *cos(pi/3+ x) is

The maximum value of cos^2(pi/3-x)-cos^2(pi/3+x) , is

The value of cos ((3pi)/2 + x)cos (2pi + x){cot ((3pi)/2 - x) + cot (2pi + x)} is-

The range of f (x) cos "" (pi [x])/(2) is

The range fo f(x)=sec(pi/3 cos^(2)x)

The minimum value of cos^(2)((pi)/3-x)-cos^(2)((pi)/3+x) is

cos ^ (2) ((pi) / (3)) + cos ^ (2) ((2 pi) / (3)) + cos ^ (2) ((4 pi) / (3)) + cos ^ ( 2) ((8 pi) / (3)) =

The greatest value of cos^(2)((pi)/(3)-x)-cos^(2)((pi)/(3)+x) is

The maximum value of cos ^(2)((pi)/(3)-x)-cos ^(2)((pi)/(3)+x) is