雙曲餘弦 shuāng qū yú xián

DEFINITIONS

  1. hyperbolic cosine or cosh (math.)

CHARACTERS

雙 shuāng set of two, pair, couple; both
曲 qū
HSK 6
crooked, bent; wrong, false
餘 yú surplus, excess, remainder
弦 xián
HSK 6
string; hypotenuse, crescent