正弦規

zing3 jin4 kwai1

a sine bar; a sine angle dresser

改弦易轍

goi2 jin4 jik6 cit3

changes one's way of doing things or one's attitude

餘弦比

jyu4 jin4 /jyun4 bei2

[math.] cosine ratio

香港管弦樂團

hoeng1 gong2 gun2 jin4 ngok6 tyun4

Hong Kong Philharmonic Orchestra

扣人心弦

kau3 jan4 sam1 jin4

exciting, thrilling

正弦比

zing3 jin4 /jyun4 bei2

[math.] sine ratio

餘弦

jyu4 jin4/jyun4

[math] cosine

正弦曲線

zing3 jin4 kuk1 sin3

sine wave | sinusoid

箭在弦上

zin3 zoi6 jin4 soeng6 ,

reach the point of no return

改弦更張

goi2 jin4 gang1 zoeng1

to make a fresh start; to start a total reform; to change policy

正弦

zing 3 jin4/jyun4

[math] sine

咬弦

ngaau5 jin4

to describe when two people or more hold different opinions or argue a lot

弦索

jin4 sok3

Strings (on an instrument); string instruments

動人心弦

dung6 jan4 sam1 jyun4

one able to stir other's emotions