# sine(theta)d(theta)

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• September 12th 2008, 06:05 AM
adefris@yahoo.com
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
• September 12th 2008, 06:15 AM
mr fantastic
Quote:

Originally Posted by adefris@yahoo.com
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

$\int \sin ( \theta ) \, d \theta = -\cos ( \theta ) + C$
• September 12th 2008, 06:21 AM
adefris@yahoo.com
what is 'C'

I have to solve it in number

Sorry
• September 12th 2008, 07:17 AM
adefris@yahoo.com
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
• September 12th 2008, 08:34 AM
hatsoff
It sounds like you may not need to take the integral. Can you please post the problem you're trying to solve in full?