The differential equation obtained on el...

The differential equation obtained on eliminating A and B from `y=A cos\ omegat+bsinomegat ,` is (a)`y^(primeprime)+ y^(prime)=0` (b.) `y^(primeprime)+omega^2y=0` (c.) `y^(primeprime)=omega^2y` (d.) `y^(primeprime)+y=0`

`y^(n)+y'=0`

`y^(n)+w^(2)y=0`

`y^(n)=w^(2)y`

`y^(n)+y=0`

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