Versedsine and Coversedsine in Circle Small 320×259 Medium 640×518 Large 1024×829 Download Tiff Original 2400×1942 | (212.9 KB) Description The coversedsine is equal to 1 minus the sine. In this figure, AE is parallel to OB; hence, EO = AC = sine of angle AOC, when radius OA - 1. Therefore, Coversedsine = 1 - sine = 1 - AC/OA = 1 - AC = 1 - EO = ER, when OA = 1. Keywords cosine, coversedsine, Sine, trigonometric circle, trigonometry, versedsine Galleries Trigonometry: Circles Source: International Correspondence Schools I.C.S. Reference Library Mathematics (Scranton: International Textbook Company, 1905) Geometry & Trigonometry Pg. 27