The continued product `16 prod_(r=1)^4 sin\ (rpi)/9` is equal to

The continued product 16prod_(r=1)^(4)sin backslash(r pi)/(9) is equal to

sum_(r=0)^(n) sin^(2)""(rpi)/(n) is equal to

sum_(r=1)^(n-1)cos^(2)""(rpi)/(n) is equal to

let z_1,z_2,z_3 and z_4 be the roots of the equation z^4 + z^3 +2=0 , then the value of prod_(r=1)^(4) (2z_r+1) is equal to :

let z_1,z_2,z_3 and z_4 be the roots of the equation z^4 + z^3 +2=0 , then the value of prod_(r=1)^(4) (2z_r+1) is equal to :

If alpha=(pi)/(13) then the value of prod_(r=1)^(6)cos r alpha is equal to

The value of prod_(r=1)^(7)cos\ (pi r)/(15) is

The value of prod_(r=1)^(7)cos\ (pi r)/(15) is

If prod_(p=1)^(r) e^(iptheta)=1 , where prod denotes the continued product and i=sqrt(-1) , the most general value of theta is (where, n is an integer)

If prod_(p=1)^(r) e^(iptheta)=1 , where prod denotes the continued product and i=sqrt(-1) , the most general value of theta is (where, n is an integer)