`(cosec^2 (pi/7) + cosec^2 ((2pi)/7) + cosec^2 ((3pi)/7))/2` =

The vlaue of cosec^(2)""(pi)/(7)+cosec^(2)""(2pi)/(7)+cosec^(2)""(3pi)/(7), is

Prove that: 2sin^2(pi/6)+cosec^2((7pi)/6)cos^2(pi/3)=3/2

Prove that 2sin^2(pi/6)+cosec^2((7pi)/6)cos^2(pi/3)=3/2

If cosec . (pi)/(32)+ cosec. (pi)/(16)+ cosec. (pi)/(8)+ cosec. (pi)/(4)+ cosec. (pi)/(2)= cot. (pi)/(k) , then the value of k is

If cosec . (pi)/(32)+ cosec. (pi)/(16)+ cosec. (pi)/(8)+ cosec. (pi)/(4)+ cosec. (pi)/(2)= cot. (pi)/(k) , then the value of k is

If cosec . (pi)/(32)+ cosec. (pi)/(16)+ cosec. (pi)/(8)+ cosec. (pi)/(4)+ cosec. (pi)/(2)= cot. (pi)/(k) , then the value of k is