cos
Description
Syntax
cos( float $num ): float
Parameters
num
An angle in radians
Return
The cosine of num
Examples
1 · num · single
<? $num = deg2rad(360); $return = cos($num); echo $return;
1
2 · num · multiple
<? for($i = 0; $i <= 360; ++$i) { $num = deg2rad($i); $return = cos($num); echo "$i: $return" . PHP_EOL; }
0: 1 1: 0.99984769515639 2: 0.9993908270191 3: 0.99862953475457 4: 0.99756405025982 5: 0.99619469809175 6: 0.99452189536827 7: 0.99254615164132 8: 0.99026806874157 9: 0.98768834059514 10: 0.98480775301221 11: 0.98162718344766 12: 0.97814760073381 13: 0.97437006478524 14: 0.970295726276 15: 0.96592582628907 16: 0.96126169593832 17: 0.95630475596304 18: 0.95105651629515 19: 0.94551857559932 20: 0.93969262078591 21: 0.9335804264972 22: 0.92718385456679 23: 0.92050485345244 24: 0.9135454576426 25: 0.90630778703665 26: 0.89879404629917 27: 0.89100652418837 28: 0.88294759285893 29: 0.8746197071394 30: 0.86602540378444 31: 0.85716730070211 32: 0.84804809615643 33: 0.83867056794542 34: 0.82903757255504 35: 0.81915204428899 36: 0.80901699437495 37: 0.79863551004729 38: 0.78801075360672 39: 0.77714596145697 40: 0.76604444311898 41: 0.75470958022277 42: 0.74314482547739 43: 0.73135370161917 44: 0.71933980033865 45: 0.70710678118655 46: 0.694658370459 47: 0.6819983600625 48: 0.66913060635886 49: 0.65605902899051 50: 0.64278760968654 51: 0.62932039104984 52: 0.61566147532566 53: 0.60181502315205 54: 0.58778525229247 55: 0.57357643635105 56: 0.55919290347075 57: 0.54463903501503 58: 0.5299192642332 59: 0.51503807491005 60: 0.5 61: 0.48480962024634 62: 0.46947156278589 63: 0.45399049973955 64: 0.43837114678908 65: 0.4226182617407 66: 0.4067366430758 67: 0.39073112848927 68: 0.37460659341591 69: 0.3583679495453 70: 0.34202014332567 71: 0.32556815445716 72: 0.30901699437495 73: 0.29237170472274 74: 0.275637355817 75: 0.25881904510252 76: 0.24192189559967 77: 0.22495105434387 78: 0.20791169081776 79: 0.19080899537654 80: 0.17364817766693 81: 0.15643446504023 82: 0.13917310096007 83: 0.12186934340515 84: 0.10452846326765 85: 0.087155742747658 86: 0.069756473744125 87: 0.052335956242944 88: 0.034899496702501 89: 0.017452406437284 90: 6.1232339957368E-17 91: -0.017452406437283 92: -0.034899496702501 93: -0.052335956242944 94: -0.069756473744125 95: -0.087155742747658 96: -0.10452846326765 97: -0.12186934340515 98: -0.13917310096007 99: -0.15643446504023 100: -0.17364817766693 101: -0.19080899537654 102: -0.20791169081776 103: -0.22495105434386 104: -0.24192189559967 105: -0.25881904510252 106: -0.275637355817 107: -0.29237170472274 108: -0.30901699437495 109: -0.32556815445716 110: -0.34202014332567 111: -0.3583679495453 112: -0.37460659341591 113: -0.39073112848927 114: -0.4067366430758 115: -0.4226182617407 116: -0.43837114678908 117: -0.45399049973955 118: -0.46947156278589 119: -0.48480962024634 120: -0.5 121: -0.51503807491005 122: -0.5299192642332 123: -0.54463903501503 124: -0.55919290347075 125: -0.57357643635105 126: -0.58778525229247 127: -0.60181502315205 128: -0.61566147532566 129: -0.62932039104984 130: -0.64278760968654 131: -0.65605902899051 132: -0.66913060635886 133: -0.6819983600625 134: -0.694658370459 135: -0.70710678118655 136: -0.71933980033865 137: -0.73135370161917 138: -0.74314482547739 139: -0.75470958022277 140: -0.76604444311898 141: -0.77714596145697 142: -0.78801075360672 143: -0.79863551004729 144: -0.80901699437495 145: -0.81915204428899 146: -0.82903757255504 147: -0.83867056794542 148: -0.84804809615643 149: -0.85716730070211 150: -0.86602540378444 151: -0.8746197071394 152: -0.88294759285893 153: -0.89100652418837 154: -0.89879404629917 155: -0.90630778703665 156: -0.9135454576426 157: -0.92050485345244 158: -0.92718385456679 159: -0.9335804264972 160: -0.93969262078591 161: -0.94551857559932 162: -0.95105651629515 163: -0.95630475596304 164: -0.96126169593832 165: -0.96592582628907 166: -0.970295726276 167: -0.97437006478524 168: -0.97814760073381 169: -0.98162718344766 170: -0.98480775301221 171: -0.98768834059514 172: -0.99026806874157 173: -0.99254615164132 174: -0.99452189536827 175: -0.99619469809175 176: -0.99756405025982 177: -0.99862953475457 178: -0.9993908270191 179: -0.99984769515639 180: -1 181: -0.99984769515639 182: -0.9993908270191 183: -0.99862953475457 184: -0.99756405025982 185: -0.99619469809175 186: -0.99452189536827 187: -0.99254615164132 188: -0.99026806874157 189: -0.98768834059514 190: -0.98480775301221 191: -0.98162718344766 192: -0.97814760073381 193: -0.97437006478524 194: -0.970295726276 195: -0.96592582628907 196: -0.96126169593832 197: -0.95630475596304 198: -0.95105651629515 199: -0.94551857559932 200: -0.93969262078591 201: -0.9335804264972 202: -0.92718385456679 203: -0.92050485345244 204: -0.9135454576426 205: -0.90630778703665 206: -0.89879404629917 207: -0.89100652418837 208: -0.88294759285893 209: -0.8746197071394 210: -0.86602540378444 211: -0.85716730070211 212: -0.84804809615643 213: -0.83867056794542 214: -0.82903757255504 215: -0.81915204428899 216: -0.80901699437495 217: -0.79863551004729 218: -0.78801075360672 219: -0.77714596145697 220: -0.76604444311898 221: -0.75470958022277 222: -0.74314482547739 223: -0.73135370161917 224: -0.71933980033865 225: -0.70710678118655 226: -0.694658370459 227: -0.6819983600625 228: -0.66913060635886 229: -0.65605902899051 230: -0.64278760968654 231: -0.62932039104984 232: -0.61566147532566 233: -0.60181502315205 234: -0.58778525229247 235: -0.57357643635105 236: -0.55919290347075 237: -0.54463903501503 238: -0.52991926423321 239: -0.51503807491005 240: -0.5 241: -0.48480962024634 242: -0.46947156278589 243: -0.45399049973955 244: -0.43837114678908 245: -0.4226182617407 246: -0.4067366430758 247: -0.39073112848927 248: -0.37460659341591 249: -0.3583679495453 250: -0.34202014332567 251: -0.32556815445716 252: -0.30901699437495 253: -0.29237170472274 254: -0.275637355817 255: -0.25881904510252 256: -0.24192189559967 257: -0.22495105434387 258: -0.20791169081776 259: -0.19080899537654 260: -0.17364817766693 261: -0.15643446504023 262: -0.13917310096007 263: -0.12186934340515 264: -0.10452846326765 265: -0.087155742747658 266: -0.069756473744126 267: -0.052335956242943 268: -0.034899496702501 269: -0.017452406437283 270: -1.836970198721E-16 271: 0.017452406437283 272: 0.0348994967025 273: 0.052335956242943 274: 0.069756473744125 275: 0.087155742747658 276: 0.10452846326765 277: 0.12186934340515 278: 0.13917310096007 279: 0.15643446504023 280: 0.17364817766693 281: 0.19080899537654 282: 0.20791169081776 283: 0.22495105434386 284: 0.24192189559967 285: 0.25881904510252 286: 0.275637355817 287: 0.29237170472274 288: 0.30901699437495 289: 0.32556815445716 290: 0.34202014332567 291: 0.3583679495453 292: 0.37460659341591 293: 0.39073112848927 294: 0.4067366430758 295: 0.4226182617407 296: 0.43837114678908 297: 0.45399049973955 298: 0.46947156278589 299: 0.48480962024634 300: 0.5 301: 0.51503807491005 302: 0.5299192642332 303: 0.54463903501503 304: 0.55919290347075 305: 0.57357643635105 306: 0.58778525229247 307: 0.60181502315205 308: 0.61566147532566 309: 0.62932039104984 310: 0.64278760968654 311: 0.65605902899051 312: 0.66913060635886 313: 0.6819983600625 314: 0.694658370459 315: 0.70710678118655 316: 0.71933980033865 317: 0.73135370161917 318: 0.74314482547739 319: 0.75470958022277 320: 0.76604444311898 321: 0.77714596145697 322: 0.78801075360672 323: 0.79863551004729 324: 0.80901699437495 325: 0.81915204428899 326: 0.82903757255504 327: 0.83867056794542 328: 0.84804809615643 329: 0.85716730070211 330: 0.86602540378444 331: 0.8746197071394 332: 0.88294759285893 333: 0.89100652418837 334: 0.89879404629917 335: 0.90630778703665 336: 0.9135454576426 337: 0.92050485345244 338: 0.92718385456679 339: 0.9335804264972 340: 0.93969262078591 341: 0.94551857559932 342: 0.95105651629515 343: 0.95630475596304 344: 0.96126169593832 345: 0.96592582628907 346: 0.970295726276 347: 0.97437006478524 348: 0.97814760073381 349: 0.98162718344766 350: 0.98480775301221 351: 0.98768834059514 352: 0.99026806874157 353: 0.99254615164132 354: 0.99452189536827 355: 0.99619469809175 356: 0.99756405025982 357: 0.99862953475457 358: 0.9993908270191 359: 0.99984769515639 360: 1