1.

Form the differential equation by eliminating the arbitrary constant from the equation y = a cos (2x + b)

Answer»

`(d^(2)y)/(dx^(2)) + 4Y = 0`
`(d^(2)y)/(dx^(2)) - 4y = 0`
`(d^(2)y)/(dx^(2)) + 2Y = 0`
`(d^(2)y)/(dx^(2)) + y = 0`

ANSWER :A


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