A plane progressive wave is given by y ...

A plane progressive wave is given by y = 2 ` cos 6.284 (330 t-x) ` . What is the period of the wave?

` (1)/( 330 ) S `

` 2 pi xx 330 S `

` (2pi xx 330 )^(-1) S `

` ( 6.284)/(330) S `

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