Syntax
tanh(number)
Description
The tanh() function returns the hyperbolic tangent of argument.
Example
printf("HYPERBOLIC TANGENT TEST\n\n")
printf(" x tan(x) definition\n")
printf(" ----- -------- ----------\n")
i = -2.1
while ((i += 0.1) <= 2.0) {
eplusx = exp(i)
eminusx = exp (-i)
printf(" %+5.2f %+8.5f %+8.5f\n",i,tanh(i),(eplusx - eminusx) / (eplusx + eminusx))
}
HYPERBOLIC TANGENT TEST
x tan(x) definition
----- -------- ----------
-2.00 -0.96403 -0.96403
-1.90 -0.95624 -0.95624
-1.80 -0.94681 -0.94681
-1.70 -0.93541 -0.93541
-1.60 -0.92167 -0.92167
-1.50 -0.90515 -0.90515
-1.40 -0.88535 -0.88535
-1.30 -0.86172 -0.86172
-1.20 -0.83365 -0.83365
-1.10 -0.80050 -0.80050
-1.00 -0.76159 -0.76159
-0.90 -0.71630 -0.71630
-0.80 -0.66404 -0.66404
-0.70 -0.60437 -0.60437
-0.60 -0.53705 -0.53705