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If z=sinθ+i(cosθ−1),i2=−1 is a purely real as well as a purely imaginary number, then the number of value(s) of θ∈[0,4π] is

Answer» If z=sinθ+i(cosθ1),i2=1 is a purely real as well as a purely imaginary number, then the number of value(s) of θ[0,4π] is


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