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Math Help - sine(theta)d(theta)

  1. #1
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    sine(theta)d(theta)

    May be it is stupid question but it has been long time since I took calculas course.

    How I solve sine(theta)d(theta)

    i have to multply certain number with: sine(theta)d(theta) as weighting factor in microsoft excel

    gaga
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  2. #2
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    Quote Originally Posted by adefris@yahoo.com View Post
    May be it is stupid question but it has been long time since I took calculas course.

    How I solve sine(theta)d(theta)

    i have to multply certain number with: sine(theta)d(theta) as weighting factor in microsoft excel

    gaga
    \int \sin ( \theta ) \, d \theta = -\cos ( \theta ) + C
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  3. #3
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    what is 'C'

    I have to solve it in number

    Sorry
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  4. #4
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    Sine(theta)d(theta) ?

    Look this is what I want to solve in excel

    Y = integral[Xsin(theta)d(theta)]
    The integral is broken into 5 (i=1 to 5)

    X is the measurments. So I want to solve sin(theta)d(theta) as a weighting factor for the measurment X.

    So theta is the midle angle for each circular rings of :

    Ring 1: 0.0 - 13
    Ring 2: 16.7 - 27
    Ring 3: 32.4 - 43.4
    Ring 4: 47.3 - 58.1
    Ring 5: 62.3 - 90

    Hope some one is out there to help
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  5. #5
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    It sounds like you may not need to take the integral. Can you please post the problem you're trying to solve in full?
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