Proceedings of the London Mathematical SocietyVolume s2-31, Issue 1 p. 355-369 Papers On a Neglected Principle in Elementary Trigonometry H. Lob, H. LobSearch for more papers by this authorH. W. Richmond, H. W. RichmondSearch for more papers by this author H. Lob, H. LobSearch for more papers by this authorH. W. Richmond, H. W. RichmondSearch for more papers by this author First published: 1930 https://doi.org/10.1112/plms/s2-31.1.355Citations: 2AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Citing Literature Volumes2-31, Issue11930Pages 355-369 RelatedInformation