两分振动方程为,x1=5cos(πt+π/2),x2=2cos(πt-π/2),则合振动方程为()


两分振动方程为,x1=5cos(πt+π/2),x2=2cos(πt-π/2),则合振动方程为()

A.x=3cos(πt-π/2)

B.x=3cos(πt+π/2)

C.x=7cos(πt+π/2)

D.x=7cos(πt-π/2)

正确答案:A


Tag:方程 时间:2023-01-06 15:30:40