sin270度等于多少_sin270度等于多少分数

singing 45度等于多少

sin195° = -0.25881904510252; c正切tan x：tan0°=0、tan30°=√3/3、tan45°=1、tan60°=√3、tan90°不存在、tan180°=0、tan360°=0、tan270°不存在。os195° = -0.965925826289068;

singing 45度等于√cos75=sin152/2。

sin270度等于多少_sin270度等于多少分数

sin270度等于多少_sin270度等于多少分数

sin270度等于多少_sin270度等于多少分数

sin270度等于多少_sin270度等于多少分数

45度的正弦值是√2/2，余弦值也是√2/2。正切值等于正弦值除以余弦值，其结果为1。余切值等于余弦值除以正弦值，其结果也是1。这是经过无数次的推理和计算得来的。sin30°=1╱2，sin60°=√3╱2，sin90°=1，sin180°=0，sin0°=0，sin270°=-1。

三角函数

一般用于计算三角形中未知长度的边和未知的角度，在导航、工程学以及物理学方面都有广泛的用途。另外，以三角函数为模版，可以定义一类相似的函数，叫做双曲函数。常见的双曲函数也被称为双曲正弦函数、双曲余弦函数等等。三角函数（也叫做圆函数）是角的函数；它们在研究三角形和建模周期现象和许多其他应用中是很重要的。

sin ,cos,tan0度180度270度360度各等于多少？

sin5° = 0.0871557427476582; cos5° = 0.9961946980746;

cos270=0sin 0=0， sin 180=0，sin270=-1，sin360=0 cos0=1，cos180=-1，cos270=0，cos360=1 tan0=0，tan180=0，tan270无意义，tan360=0

45

cos360度等于多少

cos360度等于1。360度是一个特殊角,在三角函数表上是可以查到的,也可以通过计算得出。除此之外，其特殊角还有cos0°=1、cos30°=√3/2、cos45°=√2/2、cos60°tan0=0 tan90不存在=1/2、cos90°=0、cos180°=-1、cos270°=0、cos360°=1。

cotan5° = 0.087488663525924; cot5° = 11.4300523027613;s360度等于多少

cos余弦（余弦函数）是三角函数的一种。在Rt△ABC（直角三角形）中，∠C=90°，∠A的余弦是它的邻边比三角形的斜边，即cosA=b/c，也可写为cosa=AC/AB。

余弦函数是f(x)=cosx（x∈R）。三角形任何一边的平方等于其他两边平方的和减去这两边与它们夹角的余弦的积的两倍。

三角函数是基本初等函数之一，它是以角度为自变量，角度对应任意角终边与单位圆交点坐标或其比值为因变量的函数。常见的三角函数包括正弦函数sin、余弦函数cos和正切函数tan。

特殊角的三角函数

正弦sin x： sin0°=0、sin30°=1/2、sin45°=√2/2、sin60°==√3/2、sin90°=1、sin180°=0、sin270°=-1、sin3cos0=1 cos90=060°=0。

三角函数值列个表给我。。谢

270度 -1 0 不存在

上面是废话..表看 给你两个表，个是5°至360°每隔5°的角的正弦、余弦、正切、余切函数的高精度近似值。

第二个是0°、15°、18°、30°、36°、45°、54°、60°、72°、75°、90°这些角的正弦、余弦、正切函数值的数学表达式。其他角的三角函数值的数学表达式一般极其复杂，故未收录。90°以上角的三角函数可借助此表用诱导公式求出。

==================================================

以下是个表：

sin10° = 0.17364817766693; cos10° = 0.984807753012208;

tan10° = 0.176326980708465; cot10° = 5.67128181961771;

sin15° = 0.258819045102521; cos15° = 0.965925826289068;

tan15° = 0.2679492431123; cot15° = 3.73205080756888;

sin20° = 0.342020143325669; cos20° = 0.939692620785908;

tan20° = 0.363970234266202; cot20° = 2.74747741945462;

tan25° = 0.466307658154999; cot25° = 2.14450692050956;

sin30° = 0.5; cos30° = 0.866025403784439;

tan30° = 0.5773502689626; cot30° = 1.73205080756888;

sin35° = 0.573576436351046; cos35° = 0.8152044288992;

tan35° = 0.70020753820971; cot35° = 1.42814800674211;

sin40° = 0.642787609686539; cos40° = 0.766044443118978;

tan40° = 0.83909963117728; cot40° = 1.175359259421;

sin45° = 0.707106781186547; cos45° = 0.707106781186548;

tan45° = 1; cot45° = 1;

sin50° = 0.766044443118978; cos50° = 0.642787609686539;

tan50° = 1.175359259421; cot50° = 0.83909963117728;

sin55° = 0.8152044288992; cos55° = 0.573576436351046;

tan55° = 1.42814800674211; cot55° = 0.70020753820971;

sin60° = 0.866025403784439; cos60° = 0.5;

tan60° = 1.73205080756888; cot60° = 0.5773502689626;

sin65° = 0.90630778703665; cos65° = 0.422618261740699;

tan65° = 2.14450692050956; cot65° = 0.466307658154999;

sin70° = 0.939692620785908; cos70° = 0.342020143325669;

tan70° = 2.74747741945462; cot70° = 0.363970234266202;

tan75° = 3.73205080756888; cot75° = 0.2679492431123;

sin80° = 0.984807753012208; cos80° = 0.17364817766693;

tan80° = 5.67128181961771; cot80° = 0.176326980708465;

tan85° = 11.4300523027613; cot85° = 0.0874886635259242;

sin90° = 1; cos90° = 0;

tan90° = ∞; cot90° = 0;

sin95° = 0.9961946980746; cos95° = -0.0871557427476582;

sin100° = 0.984807753012208; cos100° = -0.17364817766693;

tan100° = -5.67128181961771; cot100° = -0.176326980708465;

sin105° = 0.965925826289068; cos105° = -0.258819045102521;

tan105° = -3.73205080756888; cot105° = -0.2679492431123;

sin110° = 0.939692620785908; cos110° = -0.342020143325669;

tan110° = -2.74747741945462; cot110° = -0.363970234266202;

sin115° = 0.90630778703665; cos115° = -0.422618261740699;

tan115° = -2.14450692050956; cot115° = -0.466307658154998;

sin120° = 0.866025403784439; cos120° = -0.5;

tan120° = -1.73205080756888; cot120° = -0.5773502689625;

sin125° = 0.8152044288992; cos125° = -0.573576436351046;

tan125° = -1.42814800674212; cot125° = -0.700207538209709;

sin130° = 0.766044443118978; cos130° = -0.642787609686539;

sin135° = 0.707106781186548; cos135° = -0.707106781186547;

tan135° = -1; cot135° = -1;

sin140° = 0.642787609686539; cos140° = -0.766044443118978;

tan140° = -0.83909963117728; cot140° = -1.175359259421;

sin145° = 0.573576436351046; cos145° = -0.8152044288992;

tan145° = -0.70020753820971; cot145° = -1.42814800674211;

sin155° = 0.4226182617407; cos155° = -0.90630778703665;

tan155° = -0.466307658154999; cot155° = -2.14450692050956;

sin160° = 0.342020143325669; cos160° = -0.939692620785908;

tan160° = -0.363970234266203; cot160° = -2.74747741945462;

sin165° = 0.258819045102521; cos165° = -0.965925826289068;

tan165° = -0.2679492431123; cot165° = -3.73205080756887;

sin170° = 0.173648177666931; cos170° = -0.984807753012208;

tan170° = -0.176326980708465; cot170° = -5.6712818196177;

sin175° = 0.0871557427476582; cos175° = -0.9961946980746;

tan175° = -0.087488663525924; cot175° = -11.4300523027613;

sin180° = 0; cos180° = -1;

tan180° = 0; cot180° = ∞;

sin185° = -0.0871557427476579; cos185° = -0.9961946980746;

tan185° = 0.0874886635259238; cot185° = 11.4300523027614;

sin190° = -0.17364817766693; cos190° = -0.984807753012208;

tan190° = 0.176326980708465; cot190° = 5.67128181961771;

tan195° = 0.2679492431122; cot195° = 3.73205080756888;

sin200° = -0.342020143325669; cos200° = -0.939692620785908;

tan200° = 0.363970234266202; cot200° = 2.74747741945462;

sin205° = -0.422618261740699; cos205° = -0.90630778703665;

tan205° = 0.466307658154998; cot205° = 2.14450692050956;

sin210° = -0.5; cos210° = -0.866025403784439;

tan210° = 0.5773502689626; cot210° = 1.73205080756888;

sin215° = -0.573576436351046; cos215° = -0.8152044288992;

tan215° = 0.700207538209709; cot215° = 1.42814800674212;

sin220° = -0.642787609686539; cos220° = -0.766044443118978;

tan220° = 0.83909963117728; cot220° = 1.175359259421;

sin225° = -0.707106781186547; cos225° = -0.707106781186548;

tan225° = 1; cot225° = 1;

sin230° = -0.766044443118978; cos230° = -0.642787609686539;

tan230° = 1.175359259421; cot230° = 0.83909963117728;

sin235° = -0.8152044288992; cos235° = -0.573576436351046;

tan235° = 1.42814800674211; cot235° = 0.70020753820971;

sin240° = -0.866025403784438; cos240° = -0.5;

tan240° = 1.73205080756888; cot240° = 0.5773502689626;

sin245° = -0.90630778703665; cos245° = -0.422618261740699;

tan245° = 2.14450692050956; cot245° = 0.466307658154998;

sin° = -0.939692620785908; cos° = -0.342020143325669;

tan° = 2.74747741945462; cot° = 0.363970234266203;

tan255° = 3.73205080756888; cot255° = 0.2679492431123;

tan260° = 5.67128181961771; cot260° = 0.176326980708465;

tan265° = 11.4300523027613; cot265° = 0.0874886635259241;

sin270° = -1; cos270° = 0;

tan270° = ∞; cot270° = 0;

sin275° = -0.9961946980746; cos275° = 0.0871557427476579;

sin280° = -0.984807753012208; cos280° = 0.17364817766693;

tan280° = -5.67128181961772; cot280° = -0.176326980708465;

sin285° = -0.965925826289068; cos285° = 0.25881904510252;

sin290° = -0.939692620785908; cos290° = 0.342020143325669;

tan290° = -2.74747741945462; cot290° = -0.363970234266203;

sin295° = -0.90630778703665; cos295° = 0.422618160度261740699;

sin300° = -0.866025403784439; cos300° = 0.5;

tan300° = -1.73205080756888; cot300° = -0.5773502689626;

sin305° = -0.8152044288992; cos305° = 0.573576436351046;

tan305° = -1.42814800674211; cot305° = -0.70020753820971;

sin310° = -0.766044443118978; cos310° = 0.642787609686539;

tan310° = -1.175359259421; cot310° = -0.83909963117728;

sin315° = -0.707106781186548; cos315° = 0.707106781186547;

tan315° = -1; cot315° = -1;

sin320° = -0.64278760968654; cos320° = 0.766044443118978;

sin325° = -0.573576436351046; cos325° = 0.8152044288992;

tan325° = -0.70020753820971; cot325° = -1.42814800674211;

sin330° = -0.5; cos330° = 0.866025403784438;

tan330° = -0.5773502689627; cot330° = -1.73205080756887;

sin335° = -0.422618261740699; cos335° = 0.90630778703665;

tan335° = -0.466307658154998; cot335° = -2.14450692050956;

sin340° = -0.342020143325669; cos340° = 0.939692620785908;

sin345° = -0.258819045102521; cos345° = 0.965925826289068;

tan345° = -0.2679492431123; cot345° = -3.73205080756888;

sin350° = -0.17364817766693; cos350° = 0.984807753012208;

tan350° = -0.176326980708465; cot350° = -5.67128181961771;

sin355° = -0.0871557427476583; cos355° = 0.9961946980746;

tan355° = -0.0874886635259241; cot355° = -11.4300523027613;

tan360° = 0; cot360° = ∞;

==================================================

关于第二个表的注释：

“sqrt(x)”表示x的算术平方根，“/”表示除号。

以下是第二个表：

sin0° = 0; cos0° = 1; tan0° = ∞;

sin15° = [sqrt(6)-sqrt(2)]/4; cos15° = [sqrt(6)+sqrt(2)]/4;

tan18° = {3sqrt[50+10sqrt(5)]-5sqrt[10+2sqrt(5)]}/20;

sin30° = 1/2; cos30° = sqrt(3)/2;

tan30° = sqrt(3)/3;

sin36° = sqrt[10-2sqrt(5)]/4; cos36° = [sqrt(5)+1]/4;

sin45° = sqrt(2)/2; cos45° = sqrt(2)/2;

tan45° = 1;

sin54° = [sqrt(5)+1]/4; cos54° = sqrt[10-2sqrt(5)]/4;

tan54° = {3sqrt[50-10sqrt(5)]+5sqrt[10-2sqrt(5)]}/20;

sin60° = sqrt(3)/2; cos60° = 1/2;

tan60° = sqrt(3);

sin72° = sqrt[10+2sqrt(5)]/4; cos72° = [sqrt(5)-1]/4;

sin75° = [sqrt(6)+sqrt(2)]/4; cos75° = [sqrt(6)-sqrt(2)]/4;

tan75° = 2+sqrt(3);

sin90° = 1; cos90° = 0;

tan90° = ∞;

2-1/,290.,260;3

sin45=根号2/,45,不算特殊角吧;cos15(自己算一下)

sin30=1/那些不用记的啊

只要记住30

60

就可以了

其他

考试时是不会考的

因为要用计算器来算

cos0=1

tan0=0

sin15=（根号6-根号2）/,305;2

tan15=sin15/2

1/2

根号3/,30,350这些是特殊角么，其他的都能通过诱导公式算出来

sin

cos

tan

0度

1/2

cos30=根号3/2

-根号3/.;2

-根号3/2

-根号3

150度

这些要用到sin5和sin10;2

根号3/,335:其实只要熟记下0,60的就足够了;2

tan45=1

sin60=cos30

cos60=sin30

tan60=根号3

sin75=cos15

tan75=sin75/,230;2

根号3

90度

1不存在

120度

根号3/2

根号3/2

cos15=（根号6+根号2）/3

45度

根号2/？

sin360=sin0

cos360=cos0

tan360=tan0

PS,245sin75° = 0.965925826289068; cos75° = 0.258819045102521;.,275;2

根号2/2

tan30=根号3/cos75（自己比一下)

sin90=cos0

cos90=sin0

sin105=cos15

sin120=cos30

cos120=-sin30

tan120=-tan60

sin135=sin45

tan135=-tan45

sin150=sin30

cos150=-cos30

tan150=-tan30

sin165=sin15

cos165=-cos15

tan165=-tan15

sin180=sin0

cos180=-sin0

tan180=tan0

cos195=-cos195

tan195=tan15

215

那些不用记的啊 只要记住30 45 60 就可以了 其他 考试时是不会考的 因为要用计算器来算

cos0=1

tan0=0

sin15=（根号6-根号2）/2

cos15=（根号6+根号2）/2

tan15=sin15/cos15(自己算一下)

sin30=1/2

cos30=根号3/2

tan30=根号3/3

sin45=根号2/2

tan45=1

sin60=cos30

cos60=sin30

tan60=根号3

sin75=cos15

tan75=sin75/cos75（自己比一下)

sin90=cos0

cos90=sin0

sin105=cos15

sin120=cos30

cos120=-sin30

tan120=-tan60

sin135=sin45

tan135=-tan45

sin150=sin30

cos150=-cos30

tan150=-tan30

sin165=sin15

cos165=-cos15

tan165=-tan15

sin180=sin0

cos180=-sin0

tan180=tan0

cos195=-cos195

tan195=tan15

215,230,245,260,275,290,305,335,350这些是特殊角么....

这些要用到sin5和sin10,不算特殊角吧？

sin360=sin0

cos360=cos0

tan360=tan0

PS:其实只要熟记下0,30,45,60的就足够了，其他的都能通过诱导公式算出来

sin cos tan

0度 0 1 0

30度 1/2 根号3/2 根号3/3

45度 根号2/2 根号2/2 1

60度 根号3/2 1/2 根号3

120度 根号3/2 -1/2 -根号3

150度 1/2 -根号3/2 -根号3/3

180度 0 -1 0

360度 0 1 0

210,240,270,310,330,度的各角正弦,余弦函数值 就这几个角的正弦,余弦函数值

tan90无意义cos45=sin45

sin210°=sin(180°+30°)=-sin30°=-1/2sin240°=sin(180°+60°)=-sin60°=-√3/2 sin270°=sin(180°+90°)=-sin90°=-1sin300°=sin(360°-60°)=-sin60°=-√3/2sin330°=sin(360tan285° = -3.73205080756888; cot285° = -0.2679492431122;°-30°)=-sin30°=-1/2cos210...

sin270度怎么画

tan275° = -11.4300523027614; cot275° = -0.087488663cos270=05259237;

1、简易画法：画一条以O点为起点，B为终点的线段，做线段OA垂直OB，即OA⊥OB，即内角∠AOsin0=0B=90°，可知外角AOB为360°-90°=270°。

2、辅助线画法：以点O为圆心，画一个圆，过圆心做AC⊥DB，此时可理解为一个圆被平均分为四份，圆角为360度角，其中三份的组合内角，92°×3=270°。

sin 270度，sin 180度怎么算，求方法

sin85° = 0.9961946980746; cos85° = 0.0871557427476584;

数形结合cos105=-sin15

sin2sin265° = -0.9961946980746; cos265° = -0.0871557427476582;70°=-1

sin180°=0

完毕！

sin(x+180°)=-sinx. sin270°=sin(90°+180°)=-sin90°=-1,sin180°=sin(0°+180°)=-sin0°=0

各个角度的三角函数值

sin15°=四分之根号六减四分之根号二 cos15°=四分之根号六加四分之根号二 sin30°=二分之一

cos30°=二分之根号三 sin45°=cos45°=二分之根号二 sin60°=二分之根号三

cos60°=二分之一 sin90°=1 cos90°=0

sin120=根号3/2 cos120=-1/2 tan120=-根号3sin135=根号2/2 cos135=-根号2/2 tan135=-1sin150=1/2 cos150=-根号3/2 tan150=-根号3/3sin180=0 cos180=-1 tan180=0sin270=-1 cos270=0 tan270 无意义sin360=0 cos360=1 tan360=0

sin3tan150° = -0.5773502689626; cot150° = -1.73205080756888;0°=cos60°=二分之一

sin45°=cos45°=二分之根号二

sin60°=cos30°=二分之tan36° = {sqrt[50-10sqrt(5)]-sqrt[10-2sqrt(5)]}/4;根号三

sin18° = (√5 - 1)1/./4.

270度的三角函数值

sinx函数，即正弦函数，是三角函数的一种。对于任意一个实数x都对应着的角（弧度制中等于这个实数），而这个角又对应着确定的正弦值sinx，所以对于任意一个实数x都有确定的值sinx与它对应，按照这个对应法则所建立的函数，表示为y=sinx，叫做正弦函数。

sin270=-1

130度

tan27tan72° = {sqrt[50+10sqrt(5)]+sqrt[10+2sqrt(5)]}/4;0不存在

cot270不存在

sin270=-1

没有tan270,ctg270

8sin270度等于多少怎么算 小女子在这里谢过各位学霸了

tan130° = -1.175359259421; cot130° = -0.83909963117728;

必修四15面有个表你可以看下,sin270度是-1,乘8就是-8,或者画函数图像,就可以—8，sin270=sin(360-90)=-sin90，所以……。主要是诱导公式，你可以百度一下～帮助你更好的记忆

tan320° = -0.839099631177281; cot320° = -1.175359259421;

sin270=-sin90=-1 -18=-8

-8

-8