余弦

Traditional form:

餘弦

Pinyin (reading):

yúxián

Definitions:

• (math.) cosine

Characters:

• 余 - surplus, remainder; surname
• 弦 - bow string; string instrument; hypotenuse

Traditional characters:

• 餘 - surplus, remainder, excess
• 弦 - bow string; string instrument; hypotenuse