File:正弦二倍角公式證明圖.svg

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中文（臺灣）：正弦二倍角公式證明圖
Date
Source 張景中 (2007) 數學家的眼光, 中國少年兒童新聞出版總社, pp. 23 ISBN: 978-7-5007-8657-3.
Author 張景中

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Public domain This image of simple geometry is ineligible for copyright and therefore in the public domain, because it consists entirely of information that is common property and contains no original authorship.
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Date/TimeThumbnailDimensionsUserComment
current05:34, 30 April 2017Thumbnail for version as of 05:34, 30 April 20172,423 × 1,705 (31 KB)Dominic3203 (talk | contribs)Reduce file size
03:24, 30 April 2017Thumbnail for version as of 03:24, 30 April 20171,938 × 1,364 (245 KB)Dominic3203 (talk | contribs)User created page with UploadWizard

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