cos 15 =-0.75968791285882127384814640363328；cos15 =(√6+√2)/4？
tan 15 =-0.85599340090851876402619277823803；tan15 =2-√3？
sin 30 =-0.98803162409286178998774890729446；sin30 =6/12？即1/2 cos 30 = 0.154251449887584050718662146614265438；cos30 =√3/2？
tan 30 =-6.405331196646275784896075505668；tan30 =√3/3？sin 45 = 0.85090352453411842486237967761804；sin45 =√2/2？cos 45 = 0.52532198881772969604746440482356；cos45 =sin45 =√2/2？tan 45 = 1.6197751905438615499827965173949；tan45 =1？
sin 60 =-0.3048106210221670562564946547843；sin60 =√3/2？
cos 60 =-0.95241298041515629269381659599293；cos60 =6/12=1/2？tan 60 = 0.32004038937956297493818761970571；tan60 =√3？
sin 75 =-0.38778163540943043773094219282288；sin75 =cos15？cos 75 = 0.92175126972474931639229684521414；cos75 =sin15？
tan 75 =-0.42070095062112435384419621180484；tan75 =sin75 /cos75？=2+√3?sin 90 = 0.89399666360055789051826949840421；sin90 =cos0 =1？
cos 90 =-0.44807361612917015236547731439964；cos90 =sin0 =0？
tan 90 =-1.99200412208242025287353076376；Tan90不存在？
sin 105 =-0.9705352835374847209338032056452；sin105 =cos15？
cos 105 =-0.240959049236201414219566395281；cos105 =-sin15？tan 105 = 4.0278017638844193492341772197301；tan105 =-cot15？sin 120 = 0.5806118421231428928240695979069；sin120 =cos30？cos 120 = 0.81418097052656176790578986177889；cos120 =-sin30？tan 120 = 0.71312300978590911614556745464875；tan120 =-tan60？sin 135 = 0.088368686104001433036970666416798；sin135 =sin45？
cos 135 =-0.9960878351411849583576440142782；cos135 =-cos45？
tan 135 =-0.088715756770060446136984268003075；tan135 =-tan45？
sin 150 =-0.71487642962916463143638609739663；sin150 =sin30？cos 150 = 0.69925080647837513141645161882553；cos150 =-cos30？
tan 150 =-1.0223462354365875649863661852619；tan150 =-tan30？sin 165 = 0.99779727944989076515961268295525；sin165 =sin15？
cos 165 =-0.066336936335623731837538732255201；cos165 =-cos15？
tan 165 =-15.041353046538895371867886988769；tan165 =-tan15？
sin 180 =-0.80115263573383047774673111582099；sin180 =sin0 =0？
cos 180 =-0.5984600690578581389679486481597；cos180 =-cos0 =-1？tan 180 = 1.338690210351543616808987449579；tan180 =0？sin 195 = 0.21945466799406361597859718309894；sin195 =-sin15？cos 195 = 0.9756226979194443231181100484535；cos195 =-cos15？tan 195 = 0.22493805080802215296340937063051；tan195 =tan15？sin 360 = 0.95891572341430650775887594775378；sin360 =sin0 =0？
cos 360 =-0.28369109148652733463742432444589；cos360 =cos0 =1？
tan 360 =-3.3801404139609579824775356112668；tan360 =tan0 =0