A.Y2=Acos[2πt-π/2] B.Y2=Acos[2πt-π] C.

题库2022-08-02 38

问题

A.Y2=Acos[2πt-π/2]B.Y2=Acos[2πt-π]C.Y2=Acos[2πt+π/2]D.Y2=2Acos[2πt-0.1π]

选项 A.Y2=Acos[2πt-π/2]
B.Y2=Acos[2πt-π]
C.Y2=Acos[2πt+π/2]
D.Y2=2Acos[2πt-0.1π]

答案 D

解析

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基础知识水利水电

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