cosh

<?

$num = deg2rad(0);

$return = cosh($num);

echo $return;

1

<?

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

    $return = cosh($num);

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

-180: 11.591953275522
-179: 11.392145116101
-178: 11.195807290623
-177: 11.002879989649
-176: 10.81330444267
-175: 10.627022900206
-174: 10.443978616213
-173: 10.264115830799
-172: 10.087379753236
-171: 9.9137165452687
-170: 9.7430733047158
-169: 9.5753980493543
-168: 9.4106397010839
-167: 9.2487480703677
-166: 9.0896738409431
-165: 8.9333685547985
-164: 8.7797845974123
-163: 8.6288751832482
-162: 8.4805943415028
-161: 8.3348969021021
-160: 8.1917384819413
-159: 8.051075471365
-158: 7.912865020882
-157: 7.7770650281129
-156: 7.643634124964
-155: 7.5125316650262
-154: 7.3837177111926
-153: 7.2571530234929
-152: 7.1327990471397
-151: 7.0106179007842
-150: 6.8905723649759
-149: 6.7726258708252
-148: 6.6567424888632
-147: 6.5428869180972
-146: 6.4310244752565
-145: 6.3211210842274
-144: 6.2131432656727
-143: 6.1070581268328
-142: 6.0028333515062
-141: 5.9004371902048
-140: 5.7998384504824
-139: 5.7010064874325
-138: 5.6039111943533
-137: 5.5085229935764
-136: 5.4148128274565
-135: 5.32275214952
-134: 5.2323129157688
-133: 5.1434675761376
-132: 5.0561890661012
-131: 4.9704507984302
-130: 4.8862266550918
-129: 4.8034909792933
-128: 4.7222185676671
-127: 4.6423846625922
-126: 4.5639649446531
-125: 4.4869355252314
-124: 4.4112729392284
-123: 4.3369541379173
-122: 4.2639564819219
-121: 4.1922577343201
-120: 4.12183605387
-119: 4.0526699883564
-118: 3.9847384680561
-117: 3.9180207993194
-116: 3.8524966582662
-115: 3.7881460845951
-114: 3.7249494755027
-113: 3.6628875797125
-112: 3.6019414916098
-111: 3.5420926454834
-110: 3.4833228098693
-109: 3.4256140819974
-108: 3.3689488823377
-107: 3.3133099492451
-106: 3.2586803337011
-105: 3.2050433941507
-104: 3.1523827914331
-103: 3.1006824838041
-102: 3.0499267220497
-101: 3.0001000446881
-100: 2.9511872732601
-99: 2.9031735077054
-98: 2.8560441218232
-97: 2.8097847588173
-96: 2.764381326922
-95: 2.71981999511
-94: 2.6760871888788
-93: 2.6331695861157
-92: 2.5910541130394
-91: 2.5497279402174
-90: 2.5091784786581
-89: 2.4693933759755
-88: 2.4303605126266
-87: 2.3920679982196
-86: 2.3545041678914
-85: 2.3176575787544
-84: 2.2815170064109
-83: 2.2460714415333
-82: 2.2113100865112
-81: 2.1772223521614
-80: 2.1437978545028
-79: 2.1110264115925
-78: 2.0788980404248
-77: 2.0474029538897
-76: 2.0165315577917
-75: 1.9862744479271
-74: 1.956622407219
-73: 1.9275664029102
-72: 1.8990975838109
-71: 1.8712072776026
-70: 1.8438869881967
-69: 1.8171283931458
-68: 1.7909233411088
-67: 1.7652638493677
-66: 1.7401421013959
-65: 1.7155504444772
-64: 1.6914813873743
-63: 1.6679275980469
-62: 1.6448819014185
-61: 1.6223372771902
-60: 1.6002868577024
-59: 1.5787239258427
-58: 1.5576419129996
-57: 1.5370343970619
-56: 1.5168951004618
-55: 1.497217888263
-54: 1.4779967662917
-53: 1.4592258793109
-52: 1.440899509236
-51: 1.4230120733939
-50: 1.4055581228217
-49: 1.388532340607
-48: 1.3719295402684
-47: 1.3557446641752
-46: 1.339972782007
-45: 1.324609089252
-44: 1.3096489057428
-43: 1.2950876742313
-42: 1.280920959
-41: 1.2671444445112
-40: 1.2537539340921
-39: 1.2407453486564
-38: 1.2281147254617
-37: 1.2158582169026
-36: 1.2039720893382
-35: 1.1924527219552
-34: 1.1812966056645
-33: 1.1705003420324
-32: 1.1600606422455
-31: 1.1499743261087
-30: 1.1402383210764
-29: 1.1308496613166
-28: 1.1218054868073
-27: 1.1131030424655
-26: 1.1047396773077
-25: 1.0967128436427
-24: 1.0890200962949
-23: 1.0816590918601
-22: 1.074627587991
-21: 1.0679234427149
-20: 1.0615446137803
-19: 1.0554891580357
-18: 1.0497552308367
-17: 1.0443410854851
-16: 1.0392450726959
-15: 1.0344656400955
-14: 1.0300013317485
-13: 1.0258507877142
-12: 1.0220127436326
-11: 1.0184860303389
-10: 1.0152695735075
-9: 1.0123623933248
-8: 1.0097636041906
-7: 1.0074724144483
-6: 1.0054881261439
-5: 1.0038101348132
-4: 1.002437929298
-3: 1.0013710915899
-2: 1.0006092967033
-1: 1.0001523125763
0: 1
1: 1.0001523125763
2: 1.0006092967033
3: 1.0013710915899
4: 1.002437929298
5: 1.0038101348132
6: 1.0054881261439
7: 1.0074724144483
8: 1.0097636041906
9: 1.0123623933248
10: 1.0152695735075
11: 1.0184860303389
12: 1.0220127436326
13: 1.0258507877142
14: 1.0300013317485
15: 1.0344656400955
16: 1.0392450726959
17: 1.0443410854851
18: 1.0497552308367
19: 1.0554891580357
20: 1.0615446137803
21: 1.0679234427149
22: 1.074627587991
23: 1.0816590918601
24: 1.0890200962949
25: 1.0967128436427
26: 1.1047396773077
27: 1.1131030424655
28: 1.1218054868073
29: 1.1308496613166
30: 1.1402383210764
31: 1.1499743261087
32: 1.1600606422455
33: 1.1705003420324
34: 1.1812966056645
35: 1.1924527219552
36: 1.2039720893382
37: 1.2158582169026
38: 1.2281147254617
39: 1.2407453486564
40: 1.2537539340921
41: 1.2671444445112
42: 1.280920959
43: 1.2950876742313
44: 1.3096489057428
45: 1.324609089252
46: 1.339972782007
47: 1.3557446641752
48: 1.3719295402684
49: 1.388532340607
50: 1.4055581228217
51: 1.4230120733939
52: 1.440899509236
53: 1.4592258793109
54: 1.4779967662917
55: 1.497217888263
56: 1.5168951004618
57: 1.5370343970619
58: 1.5576419129996
59: 1.5787239258427
60: 1.6002868577024
61: 1.6223372771902
62: 1.6448819014185
63: 1.6679275980469
64: 1.6914813873743
65: 1.7155504444772
66: 1.7401421013959
67: 1.7652638493677
68: 1.7909233411088
69: 1.8171283931458
70: 1.8438869881967
71: 1.8712072776026
72: 1.8990975838109
73: 1.9275664029102
74: 1.956622407219
75: 1.9862744479271
76: 2.0165315577917
77: 2.0474029538897
78: 2.0788980404248
79: 2.1110264115925
80: 2.1437978545028
81: 2.1772223521614
82: 2.2113100865112
83: 2.2460714415333
84: 2.2815170064109
85: 2.3176575787544
86: 2.3545041678914
87: 2.3920679982196
88: 2.4303605126266
89: 2.4693933759755
90: 2.5091784786581
91: 2.5497279402174
92: 2.5910541130394
93: 2.6331695861157
94: 2.6760871888788
95: 2.71981999511
96: 2.764381326922
97: 2.8097847588173
98: 2.8560441218232
99: 2.9031735077054
100: 2.9511872732601
101: 3.0001000446881
102: 3.0499267220497
103: 3.1006824838041
104: 3.1523827914331
105: 3.2050433941507
106: 3.2586803337011
107: 3.3133099492451
108: 3.3689488823377
109: 3.4256140819974
110: 3.4833228098693
111: 3.5420926454834
112: 3.6019414916098
113: 3.6628875797125
114: 3.7249494755027
115: 3.7881460845951
116: 3.8524966582662
117: 3.9180207993194
118: 3.9847384680561
119: 4.0526699883564
120: 4.12183605387
121: 4.1922577343201
122: 4.2639564819219
123: 4.3369541379173
124: 4.4112729392284
125: 4.4869355252314
126: 4.5639649446531
127: 4.6423846625922
128: 4.7222185676671
129: 4.8034909792933
130: 4.8862266550918
131: 4.9704507984302
132: 5.0561890661012
133: 5.1434675761376
134: 5.2323129157688
135: 5.32275214952
136: 5.4148128274565
137: 5.5085229935764
138: 5.6039111943533
139: 5.7010064874325
140: 5.7998384504824
141: 5.9004371902048
142: 6.0028333515062
143: 6.1070581268328
144: 6.2131432656727
145: 6.3211210842274
146: 6.4310244752565
147: 6.5428869180972
148: 6.6567424888632
149: 6.7726258708252
150: 6.8905723649759
151: 7.0106179007842
152: 7.1327990471397
153: 7.2571530234929
154: 7.3837177111926
155: 7.5125316650262
156: 7.643634124964
157: 7.7770650281129
158: 7.912865020882
159: 8.051075471365
160: 8.1917384819413
161: 8.3348969021021
162: 8.4805943415028
163: 8.6288751832482
164: 8.7797845974123
165: 8.9333685547985
166: 9.0896738409431
167: 9.2487480703677
168: 9.4106397010839
169: 9.5753980493543
170: 9.7430733047158
171: 9.9137165452687
172: 10.087379753236
173: 10.264115830799
174: 10.443978616213
175: 10.627022900206
176: 10.81330444267
177: 11.002879989649
178: 11.195807290623
179: 11.392145116101
180: 11.591953275522