1.

Which of the following is true for z=(3+2i sin theta)//(1-2 i sin theta), where i=sqrt(-1)?

Answer»

Z is purely imaginary for `theta=N PI+-pi//3,n in Z`
z is purely imaginalry for `theta =npi +-pi//2, n in Z`
z is purely imaginary for `theta=n pi , n in Z`
z is purely imaginary for `theta=2 n pi, n inZ`

ANSWER :A


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