tangent
柯林斯詞典
1. N-COUNT A tangent is a line that touches the edge of a curve or circle at one point, but does not cross it. 切線
2. PHRASE If someone goes off on a tangent, they start saying or doing something that is not directly connected with what they were saying or doing before. 突然離題[V and N inflect]
The conversation went off on a tangent. 談話突然偏離了正題。
返回 tangent
tangent /?t?nd??nt/ (tangents)
劍橋詞典
tangent noun [C] (CIRCLE)
a straight line that touches but does not cut into a curve
切線
tangent noun [C] (TRIANGLE)
(written abbreviation tan)(in a triangle that has one angle of 90°) the ratio of the length of the side opposite an angle less than 90° divided by the length of the shorter of the two sides that are next to the angle
正切
比較
cosine
sine