tangent

英 [ˈtændʒənt]

美 [ˈtændʒənt]

n. 切线; 正切

复数：tangents　

BNC.21952 / COCA.24421

习惯用语

fly/go off at a tangent

突然转换话题；突然改变行动
to suddenly start saying or doing sth that does not seem to be connected to what has gone before

noun

切线
a straight line that touches the outside of a curve but does not cross it
正切
the ratio of the length of the side opposite an angle in a right-angled triangle to the length of the side next to it

切线
Atangentis a line that touches the edge of a curve or circle at one point, but does not cross it.
PHRASE 突然偏离原来的思路;突然离题
If someonegoes off at a tangent, they start saying or doing something that is not directly connected with what they were saying or doing before.
1. The conversation went off at a tangent.
  交谈突然偏离了正题。

noun

ratio of the opposite to the adjacent side of a right-angled triangle
Synonym:tan
a straight line or plane that touches a curve or curved surface at a point but does not intersect it at that point

If we were moving on the tangent plane, this would be an actual equality.
如果我们在切平面上移动，这将会是一个真正的等式。
Being perpendicular to the surface means that you are perpendicular to its tangent plane.
垂直于曲面也意味着垂直于它的切平面，垂直于曲面也意味着垂直于它的切平面。
We are replacing the graph by its tangent plane.
我们用函数的切平面来替代它的图像。
Describes the tangent when approaching this point from the previous point in the curve.
在曲线上从上一个点接近这个点时描述切线。
Drag to add two arcs with adjustable radii and connecting tangent lines.
拖动此形状，可添加具有可调半径和相连切线的两条弧线。
Given the algorithm for solving common tangent ball mechanism and network search algorithms.
给出了求解公切线的算法和网络搜索球机制的算法。
That's one way to define the tangent plane.
这是定义切平面的方法。
Drag to add 2 circles with tangent connecting opposite sides. Complementary tangent line can be shown.
拖动此形状，可添加切线与相对圆边相连的两个圆。可以显示互补的切线。
Let's think about the tangent plane with regard to a function f.
我们来考虑，关于函数f的一个切平面。
For? 0 we naturally get a circle; for? 0 we obtain two tangent circles.
对？0我们当然得到一个圆；对？0得到两个相切的圆。