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Returns the hyperbolic cosine of a number! Is any real number !
计算数值的双曲余弦值。！任意实数。！
youdao
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Returns the hyperbolic sine of a number! Is any real number!
返回数值的双曲正弦值。！任意实数！
youdao
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Returns the hyperbolic sine of a number! Is any real number!
返回数值的双曲正弦值。！任意实数！
youdao