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Math Help - another differentiation

  1. #1
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    another differentiation

    sorry to bother you alot

    i tried to solve this one, but im not sure about my steps.

    the problem is 1/csc(1-5x^2)

    u=(1-5x^2)
    f(u)=1/csc u im not sure if i can put it like this.

    d/du*1/csc u * d/dx (1-5x^2)

    thanks
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  2. #2
    Like a stone-audioslave ADARSH's Avatar
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    the problem is 1/csc(1-5x^2)

    u=(1-5x^2)
    f(u)=1/csc u im not sure if i can put it like this.

    \frac{d}{dx}\frac{1}{csc~u} \times \frac{d}{dx} (1-5x^2)<br />
    I dont know what is "csc()" but it seems correct
    Last edited by ADARSH; February 13th 2009 at 02:18 AM. Reason: ..
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  3. #3
    MHF Contributor
    Grandad's Avatar
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    Differentiating

    Hello katieeej
    Quote Originally Posted by katieeej View Post
    sorry to bother you alot

    i tried to solve this one, but im not sure about my steps.

    the problem is 1/csc(1-5x^2)

    u=(1-5x^2)
    f(u)=1/csc u im not sure if i can put it like this.

    d/du*1/csc u * d/dx (1-5x^2)

    thanks
    I assume that csc means 'cosec', in which case,

    \frac{1}{\csc (1-5x^2)}=\sin (1-5x^2)

    So its derivative is -10x\cos(1-5x^2)

    Grandad
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