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Evolution of the Significant Figure Rules
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10.1119/1.4818368
/content/aapt/journal/tpt/51/6/10.1119/1.4818368
http://aip.metastore.ingenta.com/content/aapt/journal/tpt/51/6/10.1119/1.4818368
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Image of Fig. 1.
Fig. 1.

Before calculators, computations were done with a slide rule. A close-up of the scale on a slide rule shows the precision of the device to be three significant figures.

Image of Fig. 2.
Fig. 2.

Determination of the number of significant figures for the cosine function using error analysis. (a) The normalized uncertainty for the cosine function plotted against the input angle. All input angles are assumed to be precise to the one's place and have an uncertainty of 0.5°. , graph of the cosine function and the uncertainty in the cosine function versus angle in degrees (from 0° to 90°). (b) The number of significant figures for the cosine function versus input angle. For a complete discussion see the online appendix.

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/content/aapt/journal/tpt/51/6/10.1119/1.4818368
2013-09-01
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Evolution of the Significant Figure Rules
http://aip.metastore.ingenta.com/content/aapt/journal/tpt/51/6/10.1119/1.4818368
10.1119/1.4818368
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