" The value of "sec(pi)/(7)*sec(2 pi)/(7)*sec(3 pi)/(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

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

The value of sin (pi)/(7)+sin (2 pi)/(7)+sin (3 pi)/(7) is

If 7theta=(2n+1)pi , where n=0,1,2,3,4,5,6 , then answer the following questions. The value of sec. (pi)/(7)+ sec. (3pi)/(7) + sec. (5pi)/(7) is

If 7theta=(2n+1)pi , where n=0,1,2,3,4,5,6 , then answer the following questions. The value of sec. (pi)/(7)+ sec. (3pi)/(7) + sec. (5pi)/(7) is

The value of sin""(pi)/(7)sin""(2pi)/(7)sin""(3pi)/(7), is

the value of (cos pi)/(7)cos(2(pi)/(7))cos(3(pi)/(7)) is

the value of sin((pi)/(7))+sin((2 pi)/(7))+sin((3 pi)/(7)) is

The value of sec^(-1)(sec(8pi)/5) is