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Significant figures for special functions (square roots)
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[QUOTE="yucheng, post: 6430139, member: 683521"] [B]TL;DR Summary:[/B] I am trying to decide which scheme to follow.... I am using square roots, however, I am confused over how many significant figures (s.f.) to keep. Suppose I have ##\sqrt{3.0}##, which has 2 s.f. From three different sources, I'll put a summary in brackets: [URL]https://www.kpu.ca/sites/default/files/downloads/signfig.pdf[/URL] (if 2 s.f. in the data, keep 3 s.f. in the result; this also appeared in the answers for Kleppner's Introduction to Mechanics) http://cda.morris.umn.edu/~mcintogc/classes/modern/sigfig.htm (if 2 s.f., keep 2s.f.) [URL]https://math.stackexchange.com/questions/1120419/how-to-determine-significant-figures-involving-radicals-and-exponents[/URL] (if 2 s.f., keep 2s.f.) So, which is correct (not for high school, but for Physics in general)? Thanks in advance. [/QUOTE]
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