What is laplacetransform cos(3t) ?

The answer to laplacetransform cos(3t) is s/(s^2+9)

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laplacetransform cos(3t)

laplace transform

cos (3 t)

\frac{s}{s ^{2} + 9}

Solution steps

L {cos (3 t)}

Use Laplace Transform table:

L {cos (a t)} = \frac{s}{s ^{2} + a ^{2}}

L {cos (3 t)} = \frac{s}{s ^{2} + 3 ^{2}}

= \frac{s}{s ^{2} + 3 ^{2}}

= \frac{s}{s ^{2} + 9}

\frac{d}{d x} (7 ln (sec (x) + tan (x)))

x y^{^{'}} + y = 26 x

y = 2 x^{3} - 6 x^{2} + 5 x + 1, (2, 3)

h^{^{'}} = - h

\frac{d}{d x} (\frac{4}{3})

What is laplacetransform cos(3t) ?
The answer to laplacetransform cos(3t) is s/(s^2+9)