Learn HSK courses HSK 2.0 Current standard HSK 3.0 Complete HSK 1 course Practice Flashcards & reading Flashcards SRS practice Reading Practice with texts HSK Decks Browse & enroll decks My Decks Manage custom decks Reference Dictionary, HSK & hanzi Dictionary Search everything HSK Review Explore texts & vocabulary Hanzi Characters & strokes Play Games All Games Pick a game Hanzi Hunter Pinyin space shooter Tone Trials Train your ear Memory March New or seen before? High Scores Your best runs Progress Stats & rankings Stats Your learning dashboard Achievements Badges & milestones Leaderboards How you rank
LearnChinese.ai - Learn Mandarin Chinese Online LearnChinese.ai - Learn Mandarin Chinese Online
LearnChinese.ai - Learn Mandarin Chinese Online LearnChinese.ai - Learn Mandarin Chinese Online
Learn
HSK 2.0 Current standard HSK 3.0 Complete HSK 1 course
Practice
Flashcards SRS practice Reading Practice with texts HSK Decks Browse & enroll decks My Decks Manage custom decks
Reference
Dictionary Search everything HSK Review Explore texts & vocabulary Hanzi Characters & strokes
Play
All Games Pick a game Hanzi Hunter Pinyin space shooter Tone Trials Train your ear Memory March New or seen before? High Scores Your best runs
Progress
Stats Your learning dashboard Achievements Badges & milestones Leaderboards How you rank
Preview the new look
Login Sign Up
Preview the new look
Back to Dictionary
正弦
zhèngxián
1. sine (of angle), written sin θ

Character Breakdown

正
zhèng
straight, right, proper, correct, just, true
HSK 2 5 丶
弦
xián
bow string; string instrument; hypotenuse
HSK 6 8 丶

Compound Words (5)

正弦形
zhèngxiánxíng
sinusoidal (shaped like a sine wave)
正弦波
zhèngxiánbō
sine wave
正弦定理
zhèngxiándìnglǐ
law of sines
双曲正弦
shuāngqūzhèngxián
hyperbolic sine or sinh (math)
双曲线正弦
shuāngqūxiànzhèngxián
hyperbolic sine or sinh (math)

Metadata

Category
Chinese

LearnChinese.ai

Master Mandarin

Site

About Custom Decks Accounts & Social Contact

Editorial

Learning Resources Blog HSK 2.0 vs 3.0

Legal

Privacy Policy Terms of Service

Books

Free Classic Courses

© 2026 LearnChinese.ai. All rights reserved.