(2sinπ/12)/(cosπ/12)-(2cosπ/12)/(sinπ/12)=[2(sinπ/12)^2-2(cosπ/12)^2]/sinπ/12cosπ/12
=(-4cosπ/6)/sinπ/6
=-4√3
三角函数(2sinπ/12)/(cosπ/12)-(2cosπ/12)/(sinπ/12)=
三角函数(2sinπ/12)/(cosπ/12)-(2cosπ/12)/(sinπ/12)=
数学人气:182 ℃时间:2019-09-29 01:42:35
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