cit3 sin3切線切线
Jyutpingcit3 sin3
Yalechit sin
Definition
A tangent line; a straight line that just touches a curve at a given point.
neutralschool
How it's used
Strictly restricted to geometry and calculus contexts, this term functions as a precise technical noun. Unlike everyday verbs like 剪 or 割, it specifically denotes the geometric property of touching a curve at a single point without crossing it.
Measure word
tiu4條tìuhExamples
What is the slope of the tangent line to this curve?
It will be clearer if you draw the tangent line out.
Related words
Common mistake
Do not confuse this with the driving term 切線, which refers to changing lanes on a road. In a mathematical context, the meaning is strictly limited to the geometric tangent.
Grammar color guide
Noun
Verb
Adjective
Adverb
Pronoun
Classifier
Particle
Connector
Grammar guides
- Directional complementsThe small words added after a verb to show direction of movement, like up, down, out, in, and back. Common in everyday Cantonese.
- DemonstrativesThis and that with 呢 and 嗰, the personal pronouns, and how 哋 turns I, you, and he into we, you all, and they.
- Resultative complementsSticking a result word onto a verb to show how it turned out, like eat until full or look and find. A productive everyday pattern.
