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Show that, y = a cos bx is a solution of the differential equation img 13.

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Show that, y = a cos bx is a solution of the differential equation img 13.

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y = a cos bx … (1) (a is an arbitrary constant)

Differentiating with respect to ‘x’ 

img 13 

Again, differentiating with respect to ‘x’

Hence proved.

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