0
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三角比の表（sin cos tan 30° 45° 60° 120°…の値）
三角比（sin cos tan）の値をまとめました。三角比の基本はこちら。
暗記すべき三角比の値
90° と 270° の tan は定義できません。これは 1/0 を定義できないことと同じです。
上表の値は三角関数でよく使われるため、すべて暗記する必要があります。頭の中で原点中心・半径 1 の円を想像し、その円周上の座標を三角比の値に対応させて覚えるといいでしょう。
度数法による整数刻みの三角比表
| 角度 | sin | cos | tan |
|---|---|---|---|
| 0 | 0 | 1 | 0 |
| 1 | 0.017452406 | 0.999847695 | 0.017455065 |
| 2 | 0.034899497 | 0.999390827 | 0.034920769 |
| 3 | 0.052335956 | 0.998629535 | 0.052407779 |
| 4 | 0.069756474 | 0.99756405 | 0.069926812 |
| 5 | 0.087155743 | 0.996194698 | 0.087488664 |
| 6 | 0.104528463 | 0.994521895 | 0.105104235 |
| 7 | 0.121869343 | 0.992546152 | 0.122784561 |
| 8 | 0.139173101 | 0.990268069 | 0.140540835 |
| 9 | 0.156434465 | 0.987688341 | 0.15838444 |
| 10 | 0.173648178 | 0.984807753 | 0.176326981 |
| 11 | 0.190808995 | 0.981627183 | 0.194380309 |
| 12 | 0.207911691 | 0.978147601 | 0.212556562 |
| 13 | 0.224951054 | 0.974370065 | 0.230868191 |
| 14 | 0.241921896 | 0.970295726 | 0.249328003 |
| 15 | 0.258819045 | 0.965925826 | 0.267949192 |
| 16 | 0.275637356 | 0.961261696 | 0.286745386 |
| 17 | 0.292371705 | 0.956304756 | 0.305730681 |
| 18 | 0.309016994 | 0.951056516 | 0.324919696 |
| 19 | 0.325568154 | 0.945518576 | 0.344327613 |
| 20 | 0.342020143 | 0.939692621 | 0.363970234 |
| 21 | 0.35836795 | 0.933580426 | 0.383864035 |
| 22 | 0.374606593 | 0.927183855 | 0.404026226 |
| 23 | 0.390731128 | 0.920504853 | 0.424474816 |
| 24 | 0.406736643 | 0.913545458 | 0.445228685 |
| 25 | 0.422618262 | 0.906307787 | 0.466307658 |
| 26 | 0.438371147 | 0.898794046 | 0.487732589 |
| 27 | 0.4539905 | 0.891006524 | 0.509525449 |
| 28 | 0.469471563 | 0.882947593 | 0.531709432 |
| 29 | 0.48480962 | 0.874619707 | 0.554309051 |
| 30 | 0.5 | 0.866025404 | 0.577350269 |
| 31 | 0.515038075 | 0.857167301 | 0.600860619 |
| 32 | 0.529919264 | 0.848048096 | 0.624869352 |
| 33 | 0.544639035 | 0.838670568 | 0.649407593 |
| 34 | 0.559192903 | 0.829037573 | 0.674508517 |
| 35 | 0.573576436 | 0.819152044 | 0.700207538 |
| 36 | 0.587785252 | 0.809016994 | 0.726542528 |
| 37 | 0.601815023 | 0.79863551 | 0.75355405 |
| 38 | 0.615661475 | 0.788010754 | 0.781285627 |
| 39 | 0.629320391 | 0.777145961 | 0.809784033 |
| 40 | 0.64278761 | 0.766044443 | 0.839099631 |
| 41 | 0.656059029 | 0.75470958 | 0.869286738 |
| 42 | 0.669130606 | 0.743144825 | 0.900404044 |
| 43 | 0.68199836 | 0.731353702 | 0.932515086 |
| 44 | 0.69465837 | 0.7193398 | 0.965688775 |
| 45 | 0.707106781 | 0.707106781 | 1 |
| 46 | 0.7193398 | 0.69465837 | 1.035530314 |
| 47 | 0.731353702 | 0.68199836 | 1.07236871 |
| 48 | 0.743144825 | 0.669130606 | 1.110612515 |
| 49 | 0.75470958 | 0.656059029 | 1.150368407 |
| 50 | 0.766044443 | 0.64278761 | 1.191753593 |
| 51 | 0.777145961 | 0.629320391 | 1.234897157 |
| 52 | 0.788010754 | 0.615661475 | 1.279941632 |
| 53 | 0.79863551 | 0.601815023 | 1.327044822 |
| 54 | 0.809016994 | 0.587785252 | 1.37638192 |
| 55 | 0.819152044 | 0.573576436 | 1.428148007 |
| 56 | 0.829037573 | 0.559192903 | 1.482560969 |
| 57 | 0.838670568 | 0.544639035 | 1.539864964 |
| 58 | 0.848048096 | 0.529919264 | 1.600334529 |
| 59 | 0.857167301 | 0.515038075 | 1.664279482 |
| 60 | 0.866025404 | 0.5 | 1.732050808 |
| 61 | 0.874619707 | 0.48480962 | 1.804047755 |
| 62 | 0.882947593 | 0.469471563 | 1.880726465 |
| 63 | 0.891006524 | 0.4539905 | 1.962610506 |
| 64 | 0.898794046 | 0.438371147 | 2.050303842 |
| 65 | 0.906307787 | 0.422618262 | 2.144506921 |
| 66 | 0.913545458 | 0.406736643 | 2.246036774 |
| 67 | 0.920504853 | 0.390731128 | 2.355852366 |
| 68 | 0.927183855 | 0.374606593 | 2.475086853 |
| 69 | 0.933580426 | 0.35836795 | 2.605089065 |
| 70 | 0.939692621 | 0.342020143 | 2.747477419 |
| 71 | 0.945518576 | 0.325568154 | 2.904210878 |
| 72 | 0.951056516 | 0.309016994 | 3.077683537 |
| 73 | 0.956304756 | 0.292371705 | 3.270852618 |
| 74 | 0.961261696 | 0.275637356 | 3.487414444 |
| 75 | 0.965925826 | 0.258819045 | 3.732050808 |
| 76 | 0.970295726 | 0.241921896 | 4.010780934 |
| 77 | 0.974370065 | 0.224951054 | 4.331475874 |
| 78 | 0.978147601 | 0.207911691 | 4.704630109 |
| 79 | 0.981627183 | 0.190808995 | 5.144554016 |
| 80 | 0.984807753 | 0.173648178 | 5.67128182 |
| 81 | 0.987688341 | 0.156434465 | 6.313751515 |
| 82 | 0.990268069 | 0.139173101 | 7.115369722 |
| 83 | 0.992546152 | 0.121869343 | 8.144346428 |
| 84 | 0.994521895 | 0.104528463 | 9.514364454 |
| 85 | 0.996194698 | 0.087155743 | 11.4300523 |
| 86 | 0.99756405 | 0.069756474 | 14.30066626 |
| 87 | 0.998629535 | 0.052335956 | 19.08113669 |
| 88 | 0.999390827 | 0.034899497 | 28.63625328 |
| 89 | 0.999847695 | 0.017452406 | 57.28996163 |
| 90 | 1 | 0 | ? |
| 91 | 0.999847695 | -0.017452406 | -57.28996163 |
| 92 | 0.999390827 | -0.034899497 | -28.63625328 |
| 93 | 0.998629535 | -0.052335956 | -19.08113669 |
| 94 | 0.99756405 | -0.069756474 | -14.30066626 |
| 95 | 0.996194698 | -0.087155743 | -11.4300523 |
| 96 | 0.994521895 | -0.104528463 | -9.514364454 |
| 97 | 0.992546152 | -0.121869343 | -8.144346428 |
| 98 | 0.990268069 | -0.139173101 | -7.115369722 |
| 99 | 0.987688341 | -0.156434465 | -6.313751515 |
| 100 | 0.984807753 | -0.173648178 | -5.67128182 |
| 101 | 0.981627183 | -0.190808995 | -5.144554016 |
| 102 | 0.978147601 | -0.207911691 | -4.704630109 |
| 103 | 0.974370065 | -0.224951054 | -4.331475874 |
| 104 | 0.970295726 | -0.241921896 | -4.010780934 |
| 105 | 0.965925826 | -0.258819045 | -3.732050808 |
| 106 | 0.961261696 | -0.275637356 | -3.487414444 |
| 107 | 0.956304756 | -0.292371705 | -3.270852618 |
| 108 | 0.951056516 | -0.309016994 | -3.077683537 |
| 109 | 0.945518576 | -0.325568154 | -2.904210878 |
| 110 | 0.939692621 | -0.342020143 | -2.747477419 |
| 111 | 0.933580426 | -0.35836795 | -2.605089065 |
| 112 | 0.927183855 | -0.374606593 | -2.475086853 |
| 113 | 0.920504853 | -0.390731128 | -2.355852366 |
| 114 | 0.913545458 | -0.406736643 | -2.246036774 |
| 115 | 0.906307787 | -0.422618262 | -2.144506921 |
| 116 | 0.898794046 | -0.438371147 | -2.050303842 |
| 117 | 0.891006524 | -0.4539905 | -1.962610506 |
| 118 | 0.882947593 | -0.469471563 | -1.880726465 |
| 119 | 0.874619707 | -0.48480962 | -1.804047755 |
| 120 | 0.866025404 | -0.5 | -1.732050808 |
| 121 | 0.857167301 | -0.515038075 | -1.664279482 |
| 122 | 0.848048096 | -0.529919264 | -1.600334529 |
| 123 | 0.838670568 | -0.544639035 | -1.539864964 |
| 124 | 0.829037573 | -0.559192903 | -1.482560969 |
| 125 | 0.819152044 | -0.573576436 | -1.428148007 |
| 126 | 0.809016994 | -0.587785252 | -1.37638192 |
| 127 | 0.79863551 | -0.601815023 | -1.327044822 |
| 128 | 0.788010754 | -0.615661475 | -1.279941632 |
| 129 | 0.777145961 | -0.629320391 | -1.234897157 |
| 130 | 0.766044443 | -0.64278761 | -1.191753593 |
| 131 | 0.75470958 | -0.656059029 | -1.150368407 |
| 132 | 0.743144825 | -0.669130606 | -1.110612515 |
| 133 | 0.731353702 | -0.68199836 | -1.07236871 |
| 134 | 0.7193398 | -0.69465837 | -1.035530314 |
| 135 | 0.707106781 | -0.707106781 | -1 |
| 136 | 0.69465837 | -0.7193398 | -0.965688775 |
| 137 | 0.68199836 | -0.731353702 | -0.932515086 |
| 138 | 0.669130606 | -0.743144825 | -0.900404044 |
| 139 | 0.656059029 | -0.75470958 | -0.869286738 |
| 140 | 0.64278761 | -0.766044443 | -0.839099631 |
| 141 | 0.629320391 | -0.777145961 | -0.809784033 |
| 142 | 0.615661475 | -0.788010754 | -0.781285627 |
| 143 | 0.601815023 | -0.79863551 | -0.75355405 |
| 144 | 0.587785252 | -0.809016994 | -0.726542528 |
| 145 | 0.573576436 | -0.819152044 | -0.700207538 |
| 146 | 0.559192903 | -0.829037573 | -0.674508517 |
| 147 | 0.544639035 | -0.838670568 | -0.649407593 |
| 148 | 0.529919264 | -0.848048096 | -0.624869352 |
| 149 | 0.515038075 | -0.857167301 | -0.600860619 |
| 150 | 0.5 | -0.866025404 | -0.577350269 |
| 151 | 0.48480962 | -0.874619707 | -0.554309051 |
| 152 | 0.469471563 | -0.882947593 | -0.531709432 |
| 153 | 0.4539905 | -0.891006524 | -0.509525449 |
| 154 | 0.438371147 | -0.898794046 | -0.487732589 |
| 155 | 0.422618262 | -0.906307787 | -0.466307658 |
| 156 | 0.406736643 | -0.913545458 | -0.445228685 |
| 157 | 0.390731128 | -0.920504853 | -0.424474816 |
| 158 | 0.374606593 | -0.927183855 | -0.404026226 |
| 159 | 0.35836795 | -0.933580426 | -0.383864035 |
| 160 | 0.342020143 | -0.939692621 | -0.363970234 |
| 161 | 0.325568154 | -0.945518576 | -0.344327613 |
| 162 | 0.309016994 | -0.951056516 | -0.324919696 |
| 163 | 0.292371705 | -0.956304756 | -0.305730681 |
| 164 | 0.275637356 | -0.961261696 | -0.286745386 |
| 165 | 0.258819045 | -0.965925826 | -0.267949192 |
| 166 | 0.241921896 | -0.970295726 | -0.249328003 |
| 167 | 0.224951054 | -0.974370065 | -0.230868191 |
| 168 | 0.207911691 | -0.978147601 | -0.212556562 |
| 169 | 0.190808995 | -0.981627183 | -0.194380309 |
| 170 | 0.173648178 | -0.984807753 | -0.176326981 |
| 171 | 0.156434465 | -0.987688341 | -0.15838444 |
| 172 | 0.139173101 | -0.990268069 | -0.140540835 |
| 173 | 0.121869343 | -0.992546152 | -0.122784561 |
| 174 | 0.104528463 | -0.994521895 | -0.105104235 |
| 175 | 0.087155743 | -0.996194698 | -0.087488664 |
| 176 | 0.069756474 | -0.99756405 | -0.069926812 |
| 177 | 0.052335956 | -0.998629535 | -0.052407779 |
| 178 | 0.034899497 | -0.999390827 | -0.034920769 |
| 179 | 0.017452406 | -0.999847695 | -0.017455065 |
| 180 | 0 | -1 | 0 |
三角比（数学Ⅰ）
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わかりやすい三角比と基本公式
0
365092
-
三角比の正弦定理の公式
0
3339
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