已知sin(α-3π)+cos(π/2+α)=m,求证cos(α-7π/2)+2sin(2kπ-α)=3m/2

来源：学生作业帮助网编辑：作业帮时间：2024/05/04 12:59:41

已知sin(α-3π)+cos(π/2+α)=m,求证cos(α-7π/2)+2sin(2kπ-α)=3m/2
已知sin(α-3π)+cos(π/2+α)=m,求证cos(α-7π/2)+2sin(2kπ-α)=3m/2

已知sin(α-3π)+cos(π/2+α)=m,求证cos(α-7π/2)+2sin(2kπ-α)=3m/2
sin(α-3π)+cos(π/2+α)=-sinα-sinα
cos(α-7π/2)+2sin(2kπ-α)=-sinα-2sinα