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Math Help - unfamiliar polar form

  1. #1
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    unfamiliar polar form

    Dear sir,
    Would be very glad if someone help me in the below problem.
    thanks
    Attached Thumbnails Attached Thumbnails unfamiliar polar form-polar.bmp  
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  2. #2
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    Do you know the formula for arc length, polar?

    \displaystyle \int_{a}^{b}\sqrt{r^2+\left(\frac{dr}{d\theta}\rig  ht)^2}d\theta
    Last edited by dwsmith; November 24th 2010 at 10:01 PM.
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  3. #3
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    Thanks for the reply.
    Yes I know the formula which involves theta but limits for 'r' is given , not theta. It is from here I faced difficulty.Please help}
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  4. #4
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    Remember that \displaystyle \frac{dr}{d\theta} = \frac{1}{\frac{d\theta}{dr}}. I assume you are using \displaystyle \phi to represent \displaystyle \theta...
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  5. #5
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    Thanks but how we are going to put 'r square' in term of theta and covert the limits of r from 1 to 3 into theta =?
    Please help
    Thanks
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  6. #6
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    Dear Sir,
    I would appreciate very much if someone would show me the solution to the above question.
    Thanks
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  7. #7
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    I am unable to see the "attached image" and so have no idea what the problem is.
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  8. #8
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    the question is in the top of this page
    Thanks
    Attached Thumbnails Attached Thumbnails unfamiliar polar form-polar.bmp  
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  9. #9
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    Dear Sir,
    I would be much obliged if someone can show me the solution of the above problem
    thanks
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