2sinπ/2－2cosπ/3＋tanπ－3tanπ/6忘了怎么做的了……
问题描述：
2sinπ/2－2cosπ/3＋tanπ－3tanπ/6
忘了怎么做的了……
答
2sinπ/2－2cosπ/3＋tanπ－3tanπ/6
=2*1－2*1/2＋0－3*√3/3
=2－1－√3
=1－√3
=1－1.732
=-0.732