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12 January, 17:57

If y=2cos (x/2) then d^2y/dx^2 =

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  1. 12 January, 18:24
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    We first need dy/dx.

    dy/dx = - 2sin (x/2) (1/2)

    dy/dx = - sin (x/2)

    We now find d^2y/dx^2.

    d^2y/dx^2 = - cos (x/2) (1/2)

    d^2y/dx^2 = - (1/2) cos (x/2)
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