shchth是反双曲函数shx=1/2(e^x-e^(-x))
chx=1/2(e^x+e^(-x))thx=shx/chxshchth是反双曲函数shx=1/2(e^x-e^(-x))
thx=shx/chxshchth是反双曲函数shx=1/2(e^x-e^(-x))chx=1/2(e^x+e^(-x))thx=shx/chxshchth是反双曲函数shx=1/2(e^x-e^(-x))chx=1/2(e^x+e^(-x))thx=shx/chxshchth是反双曲函数shx=1/2(e^x-e^(-x))chx=1/2(e^x+e^(-x))thx=shx/chx