(x) = cosh (x) d d x tanh (x) = s e c h 2 x d d x coth (x) = − c s c h 2 x {\mathrm {d}\over\mathrm {d}x}\cosh (x)=\sinh (x)\quad {\mathrm {d}\over\mathrm {d}x}\sinh (x)=\cosh. 85 人赞同了该回答 维基百科上有一个比较有意思的读法, 双曲正弦sinh读作/sintʃ/ 双曲余弦 cosh读作/kɔʃ/ 双曲正切tanh读作/tæntʃ/ 双曲余切 coth读作/kɔθ/ 双曲正割sech读作/setʃ/ 双曲.
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