Homework Statement
Prove the formula xcscx=2B(ix)-B(2ix)Homework Equations
B(x)=x/((ex)-1)
sinx= (eix-e-ix)/2i
The Attempt at a Solution
I know that it makes sense to use the formula for B(x) with x=ix and x=2ix, and rewrite xcsc(x) as x/sin(x), plugging the above relevant equation in for...