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)`

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

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

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

Prove that sin (pi/14)sin((3pi)/14)sin((5pi)/14)=1/8

If cos(pi/7), cos((3pi)/7), cos((5pi)/7) are the roots of the equation 8x^3-4x^2-4x+1=0 The value of sec(pi/7)+sec((3pi)/7)+sec((5pi)/7) 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(pi/14) + cos ((3pi)/14) + cos((5pi)/14) =

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