The value of `(cospi/30* cos(3pi)/10*cos(11pi)/30)^2+(sin pi/30*sin(3pi)/10*sin(11pi)/30)` is equal to

sin(pi/10)sin((3pi)/10)=

sin(9pi)/14sin(11pi)/14sin(13pi)/14 is equal to

sin((pi)/(10))sin((3pi)/(10))=?

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 equal to___________

The value of cos(pi/2^2).cos(pi/2^3)……….cos(pi/2^10).sin(pi/2^10) 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 2(cos pi/11 + cos(3pi)/11 + cos(5pi)/11 + cos(7pi)/11 + cos(9pi)/11) is……….