正弦 余弦 正切值表格。

正弦 余弦 正切值表格。

角的弧度数 正弦 余弦 正切
π/6 1/2 根号3/2 根号3/3
π/4 根号2/2 根号2/2 1
π/3 根号3/2 1/2 根号3
π/2 1 0 不存在
2π/3 根号3/2 -1/2 -根号3
3π/4 根号2/2 -根号2/2 -1
5π/6 1/2 -根号3/2 -根号3/3
π 0 -1 0
7π/6 -1/2 -根号3/2 根号3/3
5π/4 -根号2/2 -根号2/2 1
4π/3 -根号3/2 -1/2 根号3
3π/2 -1 0 不存在
5π/3 -根号3/2 1/2 -根号3
7π/4 -根号2/2 根号2/2 -1
11π/6 -1/2 根号3/2 -根号3/3
2π 0 1 0

直接在网上找《中学数学用表》或者用计算器就可以求得

sin30=1/2 sin45=根号2/2 sin60=根号3/2 cos30=根号3/2 cos45=根号2/2 cos60=1/2 tan30=根号3/3 tan45=1 tan60=根号3 cot30=根号3 cot45=1 cot60=根号3/3

30° 60° 90° sin 二分之一 二分之根号二 二分之根号三 cos 二分之根号三 二分之根号二 二分之一 tan 三分之根号三 1 根号三

度数 正弦sin 余弦cos 正切tan 0 0 1 0 1 0.017452406 0.999847695 0.017455065 2 0.034899497 0.999390827 0.034921 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 正弦sin 余弦cos 正切tan 43 0.68199836 0.731353702 0.932515086 44 0.69465837 0.7193398 0.965688775 45 0.70710678 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