Tangent
01
切线, 切線
a straight line that touches a curve or surface at exactly one point, known as the point of tangency
例子
In geometry class, we learned how to draw a tangent to a circle, ensuring it only touched the circle at a single point.
在几何课上，我们学习了如何画一个圆的切线，确保它只在一点接触圆。
The artist 's sketch showed a spiral with multiple tangent lines, illustrating the various points of contact.
艺术家的草图显示了一个带有多个切线的螺旋，说明了各个接触点。
02
正切, 切线
(mathematics) the ratio of the opposite to the adjacent side of a triangle that has one angle of 90°
例子
If the tangent of an angle is 1, it means the height and base of our triangle are the same.
如果一个角的切线是1，这意味着我们三角形的高度和底边是相同的。
When the sun is setting, you can use the tangent to figure out the angle the sun makes with the horizon.
当太阳落山时，你可以用切线来算出太阳与地平线形成的角度。
