1.

If z = sinthet a - icostheta then for any integer n

Answer»

`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)`

Answer :A::C


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