`Z^(N)+1/(z^(n))=2cos((npi)/2-ntheta)``z^(n)+1/(z^(n))=2sin((npi)/2-ntheta)``z^(n)-1/(z^(n))=2iin(ntheta-(npi)/2)``z^(n)-1/(z^(n))=2icos((npi)/2-ntheta)`
Your experience on this site will be improved by allowing cookies. Read Cookie Policy