怎么算cos-32π/3
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怎么算cos-32π/3怎么算cos-32π/3怎么算cos-32π/3解cos(-32π/3)=cos32π/3=cos(10π+2π/3)=cos(2π/3)=cos(π-π/3)=-cosπ/3
怎么算cos-32π/3
怎么算cos-32π/3
怎么算cos-32π/3
解cos(-32π/3)
=cos32π/3
=cos(10π+2π/3)
=cos(2π/3)
=cos(π-π/3)
=-cosπ/3
=-1/2.
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