Question

与-30°角终边相同角的集合是(    )

A.{α|α=300°}

B.{α|α=-30°+k·180°，k∈Z}

C.{α|α=330°+k·360°，k∈Z}

D.{α|α=30°-k·360°，k∈Z}

Answer 1

解析:与-30°角终边相同的角为α=k·360°-30°=(k-1)·360°+330°.故选C.

答案:C