Rau cosine: Cov lus ua ntej "co-" (hauv "cosine", "cotangent", "cosecant") yog found in Edmund Gunter's Canon triangulorum (1620), uas txhais lub cosinus raws li ib tug luv luv rau lub sinus complementi (sine ntawm lub complementary lub kaum sab xis) thiab pib los txhais cov cotangens zoo ib yam.
lo lus cosine tuaj qhov twg?
cosine (n.)
in trigonometry, 1630s, contraction of co. sinus, abbreviation of Medieval Latin complementi sinus (saib complement + sine). Lo lus tau siv hauv Latin c. 1620 los ntawm English mathematician Edmund Gunter.
lo lus sine thiab cosine tuaj qhov twg?
Lo lus "trigonometry" yog los ntawm Greek τρίγωνον trigōnon, "daim duab peb sab" thiab μέτρον metron, " ntsuas". Lo lus niaj hnub "sine" yog muab los ntawm Latin lo lus sinus, uas txhais tau tias "bay", "bosom" los yog "fold" yog indirect, ntawm Indian, Persian thiab Arabic kis tau tus mob, muab los ntawm Greek lub sij hawm khordḗ "huv-txoj hlua, chord. "
Is sin or cos?
Siv lub voj voog, lub sine ntawm lub kaum sab xis sib npaug y-tus nqi ntawm qhov kawg ntawm chav tsev voj voog ntawm ib qho arc ntawm qhov ntev t whereas lub cosine ntawm lub kaum sab xis t sib npaug x-tus nqi ntawm qhov kawg.
Vim li cas sine hu ua sine?
Lo lus "sine" (Latin "sinus") los ntawm Latin mis txhais lus los ntawm Robert ntawm Chester ntawm Arabic jiba, uas yog kev txhais lus ntawm Sanskrit lo lus ib nrab lub chord, jya-ardha.
