abbreviation of complementi sinus. Doublet of cosine. cosinus (plural cosinus or <span class="searchmatch">cosinuses</span>) (trigonometry) Synonym of cosine. 1884, A[lbert] A[ugustin] Fauvel, Chinese...
page 15: The variations are described in terms of cycles of sinuses and <span class="searchmatch">cosinuses</span>. 2007, Vladimir G. Ivancevic, Tijana T. Ivancevic, “Introduction: Human...