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    If anyone could help me out that'd be grand - tried using the substitution u = cosx and got -lncosx + c ( after using the identity tanx=sinx/cosx but i'm not sure if it's right.

    Thanks

    Ps don't ridicule me if i have done a blunder.
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    i believe thats right. you could also bring the '-' up as a power to get ln|sex(x)| +C

    where sex(u) == sec(u)
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    sex(x) best mathematical function there is :P
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    (Original post by fishpaste)
    sex(x) best mathematical function there is :P
    I'm surprised he hasn't noticed .
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    (Original post by Nylex)
    I'm surprised he hasn't noticed .
    im surprised i cant access the internet whilst dining
 
 
 

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