1.

Cos² attrans form of5. Find the laplace​

Answer»

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COS^2 (at) =( 1 + cos 2at) / 2

= 1/2 + cos 2at

Laplace TRANSFORM :

as we KNOW Laplace transform of -

1 = 1/s

cos 2at = S / ( S^2 + (2a)^2 )

1/2 L(1) + 1/2 L (cos 2at)

= 1/2S + S / 2[S^2 + (2a)^2]


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