ガウス積分の類似形

 ex2dx =π  eax2dx =πa  0eax2dx =12πa  0xeax2dx =12a  x2eax2dx =12aπa  0x3eax2dx =12a2  x4eax2dx =34a2πa  eax2+bx+cdx =πaeb24a+c

双曲線関数

 coshx =ex+ex2  sinhx =exex2  tanhx =exexex+ex=sinhxcoshx  cosh2x+sinh2x =1  1tanh2x =1cosh2x  (coshx) =sinhx  (sinhx) =coshx  (tanhx) =1cosh2x