Maple calculates the wrong answer?

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Discussion Overview

The discussion revolves around a discrepancy in calculations performed using Maple software compared to manual calculations. Participants explore potential reasons for the difference in results, focusing on the use of units in trigonometric functions.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant reports a significant difference in results between Maple (65.03) and manual calculations (59.99) for a variable a1.
  • Another participant questions the units of theta, suggesting that the difference may stem from whether degrees or radians are used.
  • A further contribution indicates that a Mathcad 15 implementation suggests Maple's answer assumes radian measure for θdw, while the manual calculation may have used degree measure.
  • One participant expresses gratitude for the insights, indicating that the clarification about units was particularly helpful.

Areas of Agreement / Disagreement

Participants appear to agree that the difference in results may be due to the use of different units for theta, but no consensus is reached on the correctness of either calculation method.

Contextual Notes

The discussion does not resolve the underlying assumptions about the calculations or the definitions of the variables involved, particularly regarding the units of measurement.

Who May Find This Useful

Individuals working with Maple or similar computational software, as well as those interested in the implications of unit measures in calculations.

dscot
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Hi all!

I have tried to calculate a1 using Maple as shown here: http://screencast.com/t/iV1XwJ1CXiqU

The problem is when I do this exact same calculation by hand with the exact same values I always end up with 59.99 but Maple gets 65.03?

How can there be such a big difference?

Thanks!
 
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What are the units of theta, degrees or radians?
 
The following Mathcad 15 implementation makes it look like Maple's 'correct' answer uses radian measure for θdw and you've used degree measure.

attachment.php?attachmentid=55341&stc=1&d=1359924526.jpg
http://screencast.com/t/iV1XwJ1CXiqU
 

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  • phys - 13 02 03 maple program units 01.jpg
    phys - 13 02 03 maple program units 01.jpg
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Wow thanks so much guys that's been driving me crazy! I can't believe I never figured that out! You guys are lifesavers :)
 
Last edited:
dscot said:
Wow thanks so much guys that's been driving me crazy! I can't believe I never figured that out! You guys are lifesavers :)
No worries. Been there, done that and worn the T-shirt to shreds.
 

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