1.

Find the Laplace transform of cos t u(t).

A. ( frac{s}{s^2+ ^2} )
B. ( frac{s}{s^2- ^2} )
C. ( frac{ }{s^2+ ^2} )
D. ( frac{ }{s^2- ^2} )
Answer» B. ( frac{s}{s^2- ^2} )


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