‘o‹Èü³Œ·ŠÖ” (hyperbolic sine function) sinh(x) (ŠïŠÖ”) ‘o‹Èü—]Š„ŠÖ” (hyperbolic cosecant function) cosech(x),csch(h)=1/sinh(x) (x‚0,ŠïŠÖ”) |
sinh(x)=(ex-e-x)/2 cosech(x),csch(x)=2/(ex-e-x) (x=0F‘Q‹ßü) |
‘o‹Èü—]Œ·ŠÖ” (hyperbolic cosine function) cosh(x) (†1,‹ôŠÖ”) ‘o‹Èü³Š„ŠÖ” (hyperbolic secant function) sech(x)=1/cosh(x) (0<sech(x)…1,‹ôŠÖ”, ‘Q‹ßü y=0) |
cosh(x)=(ex+e-x)/2
(†1) sech(x)=2/(ex+e-x) (…1) |
‘o‹Èü³ÚŠÖ” (hyperbolic tangent function) tanh(x) (ŠïŠÖ”) (|tanh(x)|<1,‘Q‹ßüy=}1) ‘o‹Èü—]ÚŠÖ” (hyperbolic cotangent function) coth(x)=1/tanh(x)@(ŠïŠÖ”) (|coth(x)|>1,‘Q‹ßüy=}1) |
tanh(x)=sinh(x)/cosh(x)=(ex-e-x)/(ex+e-x)=(e2x-1)/(e2x+1) coth(x)=cosh(x)/sinh(x)=(ex+e-x)/(ex-e-x)=(e2x+1)/(e2x-1) |
cosh2x-sinh2x=1 1-tanh2x=sech2x=1/cosh2x coth2x-1=csech2x=1/sinh2x |
”¼Šp‚ÌŒöŽ® sinh2(x/2)=(coshx -1)/2 cosh2(x/2)=(coshx +1)/2 tanh2(x/2)=(coshx -1)/(coshx +1) |
‰Á–@’è— sinh(x}y)=sinhx coshy}coshx sinhy cosh(x}y)=coshx coshy}sinhx sinhy tanh(x}y)=(tanhx}tanhy)/(1}tanhx tanhy) |
ϘaŒöŽ® sinhx coshy={sinh(x+y)+sinh(x-y)}/2 coshx sinhy={sinh(x+y)+sinh(x-y)}/2 |
˜aÏŒöŽ® sinhA+sinhB=2sinh{(A+B)/2)cosh{(A-B)/2} sinhA-sinhB=2cosh{(A+B)/2)sinh{(A-B)/2} |
coshA+coshB=2cosh{(A+B)/2)cosh{(A-B)/2} coshA-coshB=2sinh{(A+B)/2)sinh{(A-B)/2} |
2”{Šp‚ÌŒöŽ® sinh(2x)=2sinhx coshx cosh(2x)=2cosh2x-1=1+2sinh2x=sinh2x +cosh2x tanh(2x)=2tanhx/(1+tanh2x) |
3”{Šp‚ÌŒöŽ® sinh(3x)=3sinhx + 4sinh3x cosh(3x)=4cosh3x-3coshx tanh(3x)=(3tanhx+tanh3x)/(1+3tanh2x) |
d/dx sinhx = cosh x d/dx coshx = sinh x |
çcoshx dx=sinhx +C çsinhx dx=coshx +C |
d/dx csch x =-cothx cschx d/dx sech x =-tanhx sechx |
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d/dx tanhx = 1-tanh2x = sech2x d/dx cothx = 1-coth2x =-csch2x |
çdx/cosh2x=tanhx +C çdx/sinh2x=-cothx +C |
sinh(ix)=i sin(x) cosh(ix)=cos(x) |
sin(ix)=i sinh(x) cos(ix)=cosh(x) |
sinh(x+jy)=sinh(x)cos(y)+i cosh(x)sin(y)
cosh(x+jy)=cosh(x)cos(y)+i sinh(x)sin(y) tanh(x+iy)=(tanh(x)+i tan(y))/(1+itanh(x)tan(y)) |
sin(x+iy)=sinh(x)cos(y)+i cosh(x)sin(y) cos(x+iy)=cos(x)cosh(y)-i sin(x)sinh(y) tan(x+iy)=(tan(x)+i tanh(y))/(1-itan(x)tanh(y)) |
sinh-1(x)=ln(x+ã(1+x2))
@iŠïŠÖ”j cosech-1(x) or csch-1(h)=ln((1/x)+ã(1+x2)/|x|) @iŠïŠÖ”j |
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cosh-1(x)=log(x}ã(x2-1))
(x>1,xŽ²‘ÎÌ) sech-1(x) or 1/cosh-1(x)=ln((1}ã(1-x2))/x) (|x|<1) |
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tanh-1(x)=(1/2)ln((1+x)/(1-x))
(|x|<1,ŠïŠÖ”) coth-1(x)=(1/2)ln((x+1)/(x-1)) (|x|>1,ŠïŠÖ”) |