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Tangent
01
切线, 切触线
a straight line that touches a curve or surface at exactly one point, known as the point of tangency
Example
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，我们学习了如何画圆的切线，确保它只在一个点上与圆相切。
The artist 's sketch showed a spiral with multiple tangent lines, illustrating the various points of contact.
这位艺术家的素描展示了一个螺旋形状，带有多条切线，说明了不同的接触点。
02
切线, 正切
(mathematics) the ratio of the opposite to the adjacent side of a triangle that has one angle of 90°
Example
If the tangent of an angle is 1, it means the height and base of our triangle are the same.
如果一个角的正切是1，意味着我们三角形的高和底是相同的。
When the sun is setting, you can use the tangent to figure out the angle the sun makes with the horizon.
当太阳落下时，你可以使用正切来算出太阳与地平线之间的角度。
