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Re: Simple indefinite integral disagrees with table


You must use square brackets for functions.  Note what happens in what you 
entered if the xx is replaced by bb.

bb Cos (aa bb)

aa*bb^2*Cos

Integrate[xx Cos [aa xx], xx]

Cos[aa*xx]/aa^2 + (xx*Sin[aa*xx])/aa


Bob Hanlon

In a message dated 2001/5/4 12:34:13 AM, berkson at home.com writes:

>The Mathematica solution to the indefinite integral below doesn't agree
>with
>that found in my CRC tables.
>
>Integrate[xx Cos (aa xx), xx]
>= (1/3) aa Cos xx^3
>
>The CRC table gives: (1/aa^2) Cos (aa xx) + (xx/aa) Sin (aa xx)
>
>The Mathematica solution doesn't look right.  Thanks for any help.
>


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