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A point mass oscillates along the x-axis...

A point mass oscillates along the x-axis according to the law `x=x_(0) cos(moegat-pi//4). If the acceleration of the particle is written as `a=A cos(omegat+delta), the .

A

`a_0 = x_0 omega^2` , `sigma = - pi//4`

B

`a_0 = x_0 omega^2` , `sigma = pi//4`

C

`a_0 = x_0 omega^2` , `sigma = - pi//4`

D

`a_0 = x_0 omega^2` , `sigma = 3pi//4`

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