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

The value of sin""(2pi)/(7)+sin""(4pi)/(7)+sin""(8pi)/(7), is

The value of sin""(2pi)/(7)+sin""(4pi)/(7)+sin""(8pi)/(7), is

The value of sin""(15pi)/(32)sin""(7pi)/(16)sin""(3pi)/(8), is

The value of sin""(15pi)/(32)sin""(7pi)/(16)sin""(3pi)/(8), is

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

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

The value of sin""(pi)/(14).sin""(3pi)/(14).sin""(5pi)/(14).sin""(7pi)/(14).sin""(9pi)/(14).sin""(11pi)/(14).sin""(13pi)/(14) is

The value of sin ""(pi)/(16) sin ""(3pi)/(16) sin ""(5pi)/(16) sin ""(7pi)/(16) is

The value of sin ""(pi)/(16) sin ""(3pi)/(16) sin ""(5pi)/(16) sin ""(7pi)/(16) is