sin
[sin˧˧]
Proposed by a contributor, not yet supported by evidence.
Noun
Where it’s used:
Used
Toàn quốc & hải ngoại · Vietnam-wide & diaspora
Examples
Sin đi học. Cos không hư. Tang đoàn kết. Cotang kết đoàn.SOH-CAH-TOA
Wiktionary example (CC BY-SA 4.0)
Sources & notes
Imported from Wiktionary (CC BY-SA 4.0, retrieved 2026-07-29); community review pending. source ↗
Common questions
What does “sin” mean?
(noun) sine
Is “sin” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.