cosπ|3-tanπ|4+3|4tan²π|6+cos²π|6-sinπ|4
问题描述：
cosπ|3-tanπ|4+3|4tan²π|6+cos²π|6-sinπ|4
答
cosπ/3-tanπ/4+3/4tan2π/6-sinπ/6+cos2π/6+sin3π/2
=1/2-1+3√3/4-1/2+1/2-1
=3√3/4-3/2