I have a step in my book that I cannot figure and next step is I used but that does not work -
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Hello ! Originally Posted by weezie23 I have a step in my book that I cannot figure and next step is I used but that does not work - What is the derivative of ?
Originally Posted by weezie23 I have a step in my book that I cannot figure and next step is I used but that does not work - that's because an identity is not what's needed here. it is a straight substitution problem. let
Originally Posted by Moo Hello ! What is the derivative of ? geez! you just keep beating me today!
Originally Posted by weezie23 I have a step in my book that I cannot figure and next step is I used but that does not work - suppose so, now,
u = cot x du = -csc^2x integral u^2du = U^3/3+C thanks for refocusing me!!
Last edited by weezie23; September 7th 2008 at 11:54 AM.
Originally Posted by weezie23 u = cot x du = csc^2x integral u^2du = U^3/3+C thanks for refocusing me!! ahem,
Last edited by Jhevon; September 7th 2008 at 12:15 PM. Reason: forgot my dx :p
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