let `cos(pi/7),cos((3pi)/7),cos((5pi)/7),`the roots of equation `8x^3 - 4x^2 - 4x +1=0` then the value of `sin(pi/14),sin((3pi)/14),sin((5pi)/14)`

let cos((pi)/(7)),cos((3 pi)/(7)),cos((5 pi)/(7)), the roots of equation 8x^(3)-4x^(2)-4x+1=0 then the value of sin((pi)/(14)),sin((3 pi)/(14)),sin((5 pi)/(14))

The value of sin((pi)/(14))sin((3 pi)/(14))sin((5 pi)/(14)) is

Let cos(pi)/(7),cos(3 pi)/(7),cos(5 pi)/(7) are the roots of equation 8x^(3)-4x^(2)-4x+1=0 Q.The value of sec((pi)/(7))+sec((3 pi)/(7))+sec((5 pi)/(7)) is

cos((3pi)/4+x)-sin(pi/4-x)=?

The value of sin (pi/14). sin((3pi)/14). sin( (5pi)/14)………. Sin ((13pi)/14) is

The value of sin ((pi) / (14)) sin ((3 pi) / (14)) sin ((8 pi) / (14)) =