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The equation y=A cos^(2) (2pi nt -2 pi (...

The equation `y=A cos^(2) (2pi nt -2 pi (x)/(lambda))` represents a wave with

A

Amplitude A/2, frequency 2n and wavelength `lambda//2`

B

Amplitude A/2, frequency 2n and wavelength `lambda`

C

Amplitude A , frequency 2n and wavelength `2 lambda`

D

Amplitude A , frequency n and wavelength `lambda`

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The correct Answer is:
A
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