计算:5sin(π⼀2)+2cos 0-3sin(3π⼀2)+11cosπ

计算:5sin(π/2)+2cos 0-3sin(3π/2)+11cosπ
2025-01-05 17:09:04
推荐回答(1个)
回答1:

因为sin(π/2)=1,cos 0=1,sin(3π/2)=-1,cosπ=-1
故5sin(π/2)+2cos 0-3sin(3π/2)+11cosπ=5+2+3-11=-1