tanh

<?

$num = deg2rad(0);

$return = tanh($num);

echo $return;

0

<?

for($i = -180; $i <= 180; ++$i)
{
    $num = deg2rad($i);

    $return = tanh($num);

    echo "$i: $return" . PHP_EOL;
}

-180: -0.99627207622075
-179: -0.99613990488293
-178: -0.99600305687075
-177: -0.99586136738445
-176: -0.99571466586577
-175: -0.99556277580027
-174: -0.99540551451313
-173: -0.99524269295818
-172: -0.99507411550004
-171: -0.99489957968908
-170: -0.99471887602909
-169: -0.99453178773734
-168: -0.9943380904969
-167: -0.99413755220088
-166: -0.99392993268855
-165: -0.9937149834729
-164: -0.99349244745951
-163: -0.99326205865656
-162: -0.99302354187553
-161: -0.99277661242256
-160: -0.99252097578008
-159: -0.99225632727851
-158: -0.99198235175779
-157: -0.99169872321841
-156: -0.99140510446174
-155: -0.9911011467194
-154: -0.99078648927139
-153: -0.99046075905265
-152: -0.9901235702479
-151: -0.98977452387445
-150: -0.98941320735268
-149: -0.98903919406394
-148: -0.98865204289565
-147: -0.98825129777334
-146: -0.9878364871793
-145: -0.98740712365769
-144: -0.98696270330583
-143: -0.98650270525144
-142: -0.98602659111559
-141: -0.98553380446115
-140: -0.98502377022663
-139: -0.98449589414505
-138: -0.98394956214783
-137: -0.98338413975347
-136: -0.98279897144087
-135: -0.98219338000724
-134: -0.98156666591047
-133: -0.9809181065959
-132: -0.98024695580744
-131: -0.97955244288314
-130: -0.97883377203507
-129: -0.97809012161373
-128: -0.97732064335712
-127: -0.97652446162444
-126: -0.97570067261491
-125: -0.97484834357173
-124: -0.97396651197164
-123: -0.97305418470051
-122: -0.97211033721521
-121: -0.9711339126926
-120: -0.97012382116593
-119: -0.96907893864966
-118: -0.96799810625322
-117: -0.96688012928479
-116: -0.96572377634598
-115: -0.96452777841865
-114: -0.96329082794493
-113: -0.96201157790192
-112: -0.96068864087259
-111: -0.95932058811438
-110: -0.95790594862747
-109: -0.95644320822453
-108: -0.95493080860423
-107: -0.95336714643067
-106: -0.9517505724214
-105: -0.95007939044665
-104: -0.94835185664272
-103: -0.94656617854269
-102: -0.94472051422791
-101: -0.94281297150381
-100: -0.94084160710399
-99: -0.93880442592682
-98: -0.93669938030884
-97: -0.93452436933995
-96: -0.93227723822526
-95: -0.92995577769903
-94: -0.92755772349639
-93: -0.92508075588896
-92: -0.92252249929055
-91: -0.91988052193988
-90: -0.91715233566727
-89: -0.91433539575277
-88: -0.91142710088359
-87: -0.90842479321897
-86: -0.90532575857111
-85: -0.90212722671097
-84: -0.89882637180843
-83: -0.89542031301628
-82: -0.89190611520815
-81: -0.88828078988071
-80: -0.88454129623088
-79: -0.88068454241886
-78: -0.87670738702846
-77: -0.8726066407361
-76: -0.86837906820021
-75: -0.86402139018307
-74: -0.85953028591693
-73: -0.85490239572683
-72: -0.85013432392194
-71: -0.84522264196785
-70: -0.84016389195162
-69: -0.83495459035155
-68: -0.82959123212316
-67: -0.82407029511257
-66: -0.8183882448081
-65: -0.81254153944012
-64: -0.80652663543869
-63: -0.80033999325755
-62: -0.7939780835723
-61: -0.78743739385906
-60: -0.78071443535927
-59: -0.77380575043426
-58: -0.76670792031219
-57: -0.75941757322776
-56: -0.75193139295362
-55: -0.7442461277199
-54: -0.73635859951643
-53: -0.72826571376936
-52: -0.71996446938177
-51: -0.71145196912451
-50: -0.70272543036107
-49: -0.6937821960869
-48: -0.68461974626029
-47: -0.67523570939876
-46: -0.66562787441124
-45: -0.65579420263267
-44: -0.6457328400242
-43: -0.63544212949809
-42: -0.62492062332306
-41: -0.61416709556177
-40: -0.60318055448854
-39: -0.59196025493197
-38: -0.58050571048341
-37: -0.56881670550901
-36: -0.55689330690021
-35: -0.54473587549434
-34: -0.53234507709491
-33: -0.51972189301883
-32: -0.50686763009609
-31: -0.4937839300464
-30: -0.48047277815645
-29: -0.46693651118127
-28: -0.45317782439382
-27: -0.43919977770797
-26: -0.42500580080179
-25: -0.41059969717081
-24: -0.39598564704382
-23: -0.38116820909825
-22: -0.36615232091646
-21: -0.35094329813024
-20: -0.33554683220664
-19: -0.31996898683552
-18: -0.30421619288674
-17: -0.28829524191317
-16: -0.27221327818439
-15: -0.25597778924568
-14: -0.23959659500614
-13: -0.22307783537025
-12: -0.20642995643743
-11: -0.18966169530445
-10: -0.17278206351636
-9: -0.15580032922162
-8: -0.13872599809769
-7: -0.12156879312299
-6: -0.1043386332806
-5: -0.08704561128797
-4: -0.069699970455219
-3: -0.05231208078177
-2: -0.034892414407949
-1: -0.017451520543542
0: 0
1: 0.017451520543542
2: 0.034892414407949
3: 0.05231208078177
4: 0.069699970455219
5: 0.08704561128797
6: 0.1043386332806
7: 0.12156879312299
8: 0.13872599809769
9: 0.15580032922162
10: 0.17278206351636
11: 0.18966169530445
12: 0.20642995643743
13: 0.22307783537025
14: 0.23959659500614
15: 0.25597778924568
16: 0.27221327818439
17: 0.28829524191317
18: 0.30421619288674
19: 0.31996898683552
20: 0.33554683220664
21: 0.35094329813024
22: 0.36615232091646
23: 0.38116820909825
24: 0.39598564704382
25: 0.41059969717081
26: 0.42500580080179
27: 0.43919977770797
28: 0.45317782439382
29: 0.46693651118127
30: 0.48047277815645
31: 0.4937839300464
32: 0.50686763009609
33: 0.51972189301883
34: 0.53234507709491
35: 0.54473587549434
36: 0.55689330690021
37: 0.56881670550901
38: 0.58050571048341
39: 0.59196025493197
40: 0.60318055448854
41: 0.61416709556177
42: 0.62492062332306
43: 0.63544212949809
44: 0.6457328400242
45: 0.65579420263267
46: 0.66562787441124
47: 0.67523570939876
48: 0.68461974626029
49: 0.6937821960869
50: 0.70272543036107
51: 0.71145196912451
52: 0.71996446938177
53: 0.72826571376936
54: 0.73635859951643
55: 0.7442461277199
56: 0.75193139295362
57: 0.75941757322776
58: 0.76670792031219
59: 0.77380575043426
60: 0.78071443535927
61: 0.78743739385906
62: 0.7939780835723
63: 0.80033999325755
64: 0.80652663543869
65: 0.81254153944012
66: 0.8183882448081
67: 0.82407029511257
68: 0.82959123212316
69: 0.83495459035155
70: 0.84016389195162
71: 0.84522264196785
72: 0.85013432392194
73: 0.85490239572683
74: 0.85953028591693
75: 0.86402139018307
76: 0.86837906820021
77: 0.8726066407361
78: 0.87670738702846
79: 0.88068454241886
80: 0.88454129623088
81: 0.88828078988071
82: 0.89190611520815
83: 0.89542031301628
84: 0.89882637180843
85: 0.90212722671097
86: 0.90532575857111
87: 0.90842479321897
88: 0.91142710088359
89: 0.91433539575277
90: 0.91715233566727
91: 0.91988052193988
92: 0.92252249929055
93: 0.92508075588896
94: 0.92755772349639
95: 0.92995577769903
96: 0.93227723822526
97: 0.93452436933995
98: 0.93669938030884
99: 0.93880442592682
100: 0.94084160710399
101: 0.94281297150381
102: 0.94472051422791
103: 0.94656617854269
104: 0.94835185664272
105: 0.95007939044665
106: 0.9517505724214
107: 0.95336714643067
108: 0.95493080860423
109: 0.95644320822453
110: 0.95790594862747
111: 0.95932058811438
112: 0.96068864087259
113: 0.96201157790192
114: 0.96329082794493
115: 0.96452777841865
116: 0.96572377634598
117: 0.96688012928479
118: 0.96799810625322
119: 0.96907893864966
120: 0.97012382116593
121: 0.9711339126926
122: 0.97211033721521
123: 0.97305418470051
124: 0.97396651197164
125: 0.97484834357173
126: 0.97570067261491
127: 0.97652446162444
128: 0.97732064335712
129: 0.97809012161373
130: 0.97883377203507
131: 0.97955244288314
132: 0.98024695580744
133: 0.9809181065959
134: 0.98156666591047
135: 0.98219338000724
136: 0.98279897144087
137: 0.98338413975347
138: 0.98394956214783
139: 0.98449589414505
140: 0.98502377022663
141: 0.98553380446115
142: 0.98602659111559
143: 0.98650270525144
144: 0.98696270330583
145: 0.98740712365769
146: 0.9878364871793
147: 0.98825129777334
148: 0.98865204289565
149: 0.98903919406394
150: 0.98941320735268
151: 0.98977452387445
152: 0.9901235702479
153: 0.99046075905265
154: 0.99078648927139
155: 0.9911011467194
156: 0.99140510446174
157: 0.99169872321841
158: 0.99198235175779
159: 0.99225632727851
160: 0.99252097578008
161: 0.99277661242256
162: 0.99302354187553
163: 0.99326205865656
164: 0.99349244745951
165: 0.9937149834729
166: 0.99392993268855
167: 0.99413755220088
168: 0.9943380904969
169: 0.99453178773734
170: 0.99471887602909
171: 0.99489957968908
172: 0.99507411550004
173: 0.99524269295818
174: 0.99540551451313
175: 0.99556277580027
176: 0.99571466586577
177: 0.99586136738445
178: 0.99600305687075
179: 0.99613990488293
180: 0.99627207622075