If the displacement at time 't' is x = acost, the acceleration is ....

1.	If the displacement at time 't' is x = acost, the acceleration is .......
Answer» ` COS t ` `-a cos t ` `a SIN t` `-a sin t` Solution :`X =a cos t` `(DX)/(dt) =- a sin t` `(d ^(2)x)/(dt ^(2)) =- a cos t`

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