lì yòng / shuāng qū yú xián / de / dìng yì / wǒ men / kě yǐ / tuī dǎo / chū / yī xiē / cháng yòng / de / jī fēn / gōng shì利用双曲余弦的定义,我们可以推导出一些常用的积分公式。Using the definition of hyperbolic cosine, we can derive some commonly used integral formulas.