Page 19 - BUKU KALIN (bismillah Fix)_Bab 6
P. 19
1 1 +
−1
. tanh = ln
2 1 −
Jelas,
1 1 +
(tanh −1 ) ( ln 1 − )
2
= ( )
(tanh −1 ) 1 |ln (1 + )| |ln (1 − )|
= [ − ]
2
(tanh −1 )
1 |ln(1 + )| (1 + )
= [ .
2 (1 + )
|ln(1 − )| (1 − )
− . ]
(tanh −1 ) 1 1 1
= [ + ]
2 1 + 1 −
(tanh −1 ) 1 1 − + 1 +
= [ ]
2 1 + 2
(tanh −1 ) 1 2 1
= . =
2 1 − 2 1 − 2
1
. coth −1 = ln 1+
2 1− 
