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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | Re: [gislist] Trig function problems with spreadsheets |
| Date: |
09/27/2006 09:50:00 AM |
| From: |
Bryan Keith |
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Lawrence,
Both are correct. sine of 89.1712056 radians is .934414355, sine of
89.1712056 degrees is 0.999895380
Typically sine functions take radians as input units. Your scientific
calculator takes degrees.
Bryan
Lawrence Hartpence wrote:
> Hello,
> This is kind of an odd question.
>
> I had a line which I knew the angle and the distance. I wanted to calculate
> the delta x and the delta y using trig functions. I found that using the
> sine and cosine functions in my spreadsheet produced wrong results. I used
> a scientific calculator and received right results. Does anyone know why
> the difference?
>
> Example: Spreadsheet says sine of 89.1712056 is .934414355, scientific
> calculator says 0.999895380.
>
> Thanks,
>
> Lawrence Hartpence
> GIS Coordinator
> 101 1st St N0
> Newton IA 50208
> 641-792-3084
> hartpence_gis@co.jasper.ia.us
>
>
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