分类：教育/科学-理工学科-数学
问题：高中数学cosπ/3+tanπ/4+3tan2π/6+sinπ/ 
cπ/3+tanπ/4+3tan2π/6+sinπ/2+cosπ+sin3π/2等于？
回答：cos(π/3)+tan(π/4)+3tan(2π/6)+sin(π/2)+sin(3π/2)
＝cos(π/3)+tan(π/4)+3tan(π/3)+sin(π/2)-sin(π/2)
＝1/2+1+3·√3
＝(3+6√3)/2。