airking007
幼苗
共回答了6个问题采纳率:83.3% 举报
sin(1035°)=sin(1080°-45°)=sin(-45°)=-sin45°=-√2/2
cos(1035°)=cos1080°-45°)=cos(-45°)=cos45°=√2/2
tan(1035°)=sin(1035°)/cos(1035°)=-1
sin(-765°)=sin(-720°-45°)=sin(-45°)=-sin45°=-√2/2
cos(-765°)=cos(-720°-45°)=cos(-45°)=cos45°=√2/2
tan(-765°)=sin(-765°)/cos(-765°)=-1
1年前
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