noun🔗ShareKosinusIn a right triangle, the ratio of the length of the side adjacent to an acute angle to the length of the hypotenuse. Symbol: cos"In Mr. Jones' math class, Sarah learned that the cosine of a 30-degree angle in a right triangle is the length of the adjacent side divided by the length of the hypotenuse. "In Herrn Jones' Mathekurs lernte Sarah, dass der Kosinus eines 30-Grad-Winkels in einem rechtwinkligen Dreieck die Länge der Ankathete geteilt durch die Länge der Hypotenuse ist.mathscienceChat with AIVocabulary GamePractice Reading