sin90度是多少

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.z.

初中三角函数详细数值表

本篇是关于初中三角函数的速记与理解，皆

来自于课本与网络，所以免费。欢送曾经与

我一样不理解的初学者观阅~~~~~

本品仅用于学习交流，绝。

首先，我们先理解根底概念，如下：

SinA=斜边

的对边A

CosA=斜边

的邻边A

TanA=的邻边

的对边

A

A





CotA=的对边

的邻边

A

A





还有一点很重要，0

0

根据三角函数的定义，我们还可以得出

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.z.

ＳｉｎＡ＊２＋ＣｏｓＡ＊２＝１

ＴａｎＡ·ＣｏｔＡ＝１

ＴａｎＡ＝ＳｉｎＡ／ＣｏｓＡ

ＣｏｔＡ＝ＣｏｓＡ／ＳｉｎＡ

ＴａｎＡ＝１／ＣｏｔＡ

sinA=cos〔90-A〕

tanA=cotA〔90-A〕

此为必背图表

角度

三角函数

０度

３０度４５度６０度９０度

ｓｉｎ０１／２

2

2

2

3

１

ｃｏｓ１

2

3

2

2

１／２０

ｔａｎ０

3

3

１3――

ｃｏｔ――3１

3

3

０

相对应的示意图见下页～～～～～～～～～～～～～～～～～

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.z.

＜Ａ＝３０度

＜Ａ＝４５度

＜Ａ＝６０度

如何用计算器计算函数值

〔1〕求锐角的三角函数值

求sin63°52′41″的值．〔准确到0．0001〕

先用如下方法将角度单位状态设定为“度〞：

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.z.

SHIFTMODE(SETUP)３显示Ｄ

依次键入sin63°52′41″＝

得到结果；

求cot70°45′的值．〔准确到0．0001〕

在角度单位状态为“度〞的情况下〔屏幕显示〕，

按以下顺序依次按键：

１÷cot70°45′＝

得到结果

〔2〕由锐角三角函数值求锐角

tan*＝0．7410，求锐角*．〔准确到1′〕

在角度单位状态为“度〞的情况下〔屏幕显示〕，

按以下顺序依次按键：

SHIFTtan〔1tan〕0·７４１＝０

得到结果

再次键入SHIFTo’’’完成

接下来如标题示，整理好的三角函数表

sin15=〔√6-√2)/4,

sin75=(√6+√2)/2,

sin105=√2/2*(√3/2+1/2)

sin120=√3/2

sin135=√2/2

sin150=1/2

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.z.

sin165=〔√6-√2)/4

sin180=0

sin270=-1

sin360=0

〔上为特殊值〕

sin1=0.01745

sin2=0.034899

sin3=0.052335

sin4=0.069756

sin5=0.087155

sin6=0.104528

sin7=0.121869

sin8=0.139173

sin9=0.156434

sin10=0.17364

sin11=0.19080

sin12=0.20791

sin13=0.22495

sin14=0.24192

sin15=0.25881

sin16=0.27563

sin17=0.29237

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sin18=0.30901

sin19=0.32556

sin20=0.34202

sin21=0.35836

sin22=0.37460

sin23=0.39073

sin24=0.40673

sin25=0.42261

sin26=0.43837

sin27=0.45399

sin28=0.46947

sin29=0.48480

sin30=0.49999

sin31=0.51503

sin32=0.52991

sin33=0.54463

sin34=0.55919

sin35=0.57357

sin36=0.58778

sin37=0.60181

sin38=0.61566

sin39=0.62932

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sin40=0.64278

sin41=0.65605

sin42=0.66913

sin43=0.68199

sin44=0.69465

sin45=0.70710

sin46=0.71933

sin47=0.73135

sin48=0.74314

sin49=0.75470

sin50=0.76604

sin51=0.77714

sin52=0.78801

sin53=0.79863

sin54=0.80901

sin55=0.81915

sin56=0.82903

sin57=0.83867

sin58=0.84804

sin59=0.85716

sin60=0.86602

sin61=0.87461

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.z.

sin62=0.88294

sin63=0.89100

sin64=0.89879

sin65=0.90630

sin66=0.91354

sin67=0.92050

sin68=0.92718

sin69=0.93358

sin70=0.93969

sin71=0.94551

sin72=0.95105

sin73=0.95630

sin74=0.96126

sin75=0.96592

sin76=0.97029

sin77=0.97437

sin78=0.97814

sin79=0.98162

sin80=0.98480

sin81=0.98768

sin82=0.99026

sin83=0.99254

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sin84=0.99452

sin85=0.99619

sin86=0.99756

sin87=0.99862

sin88=0.99939

sin89=0.99984

sin90=1

cos1=0.99984

cos2=0.99939

cos3=0.99862

cos4=0.99756

cos5=0.99619

cos6=0.99452

cos7=0.99254

cos8=0.99026

cos9=0.98768

cos10=0.9848

cos11=0.9816

cos12=0.97814

cos13=0.9743

cos14=0.9702

cos15=0.9659

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cos16=0.9612

cos17=0.9563

cos18=0.9510

cos19=0.9455

cos20=0.9396

cos21=0.9335

cos22=0.9271

cos23=0.9205

cos24=0.9135

cos25=0.9063

cos26=0.8987

cos27=0.8910

cos28=0.8829

cos29=0.8746

cos30=0.8660

cos31=0.8571

cos32=0.8480

cos33=0.8386

cos34=0.8290

cos35=0.8191

cos36=0.8090

cos37=0.7986

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cos38=0.7880

cos39=0.7771

cos40=0.7660

cos41=0.7547

cos42=0.7431

cos43=0.7313

cos44=0.7193

cos45=0.7071

cos46=0.6946

cos47=0.6819

cos48=0.6691

cos49=0.6560

cos50=0.6427

cos51=0.6293

cos52=0.6156

cos53=0.6018

cos54=0.5877

cos55=0.5735

cos56=0.5592

cos57=0.5446

cos58=0.5299

cos59=0.5150

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cos60=0.5000

cos61=0.4848

cos62=0.4694

cos63=0.4539

cos64=0.4383

cos65=0.4226

cos66=0.4067

cos67=0.3907

cos68=0.3746

cos69=0.3583

cos70=0.3420

cos71=0.3255

cos72=0.3090

cos73=0.2923

cos74=0.2756

cos75=0.2588

cos76=0.2419

cos77=0.2249

cos78=0.2079

cos79=0.1908

cos80=0.1736

cos81=0.1564

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cos82=0.1391

cos83=0.1218

cos84=0.1045

cos85=0.0871

cos86=0.06973

cos87=0.052

cos88=0.0348

cos89=0.0174

cos90=0

tan1=0.017455

tan2=0.034920

tan3=0.052407

tan4=0.069926

tan5=0.087488

tan6=0.105104

tan7=0.122784

tan8=0.140540

tan9=0.158384

tan10=0.17632

tan11=0.19438

tan12=0.21255

tan13=0.23086

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tan14=0.24932

tan15=0.26794

tan16=0.28674

tan17=0.30573

tan18=0.32491

tan19=0.34432

tan20=0.36397

tan21=0.38386

tan22=0.40402

tan23=0.42447

tan24=0.44522

tan25=0.46630

tan26=0.48773

an27=0.50952

tan28=0.53170

tan29=0.55430

tan30=0.57735

tan31=0.60086

tan32=0.62486

tan33=0.64940

tan34=0.67450

tan35=0.70020

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tan36=0.72654

tan37=0.75355

tan38=0.78128

tan39=0.80978

tan40=0.83909

tan41=0.86928

tan42=0.90040

tan43=0.93251

tan44=0.96568

tan45=0.99999

tan46=1.03553

tan47=1.07236

tan48=1.11061

tan49=1.15036

tan50=1.19175

tan51=1.23489

tan52=1.27994

tan53=1.32704

tan54=1.3763

tan55=1.42814

tan56=1.48256

tan57=1.53986

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tan58=1.60033

tan59=1.66427

tan60=1.73205

tan61=1.80404

tan62=1.88072

tan63=1.96261

tan64=2.05030

tan65=2.14450

tan66=2.24603

tan67=2.35585

tan68=2.47508

tan69=2.60508

tan70=2.74747

tan71=2.90421

tan72=3.07768

tan73=3.27085

tan74=3.48741

tan75=3.73205

tan76=4.01078

tan77=4.33147

tan78=4.70463

tan79=5.14455

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tan80=5.67128

tan81=6.31375

tan82=7.11536

tan83=8.14434

tan84=9.51436

tan85=11.4300

tan86=14.3006

tan87=19.0811

tan88=28.6362

tan89=57.2899

tan90=无取值

如果求准确度的话，还可以看下面

sin1=0.

sin2=0.

sin3=0.

sin4=0.41253

sin5=0.

sin6=0.

sin7=0.

sin8=0.

sin9=0.

sin10=0.

sin11=0.65448

sin12=0.

sin13=0.

sin14=0.

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.z.

sin15=0.

sin16=0.

sin17=0.27367

sin18=0.49474

sin19=0.71567

sin20=0.56687

sin21=0.

sin22=0.5912

sin23=0.92737

sin24=0.

sin25=0.

sin26=0.90774

sin27=0.

sin28=0.58908

sin29=0.

sin30=0.

sin31=0.00542

sin32=0.32049

sin33=0.5027

sin34=0.07468

sin35=0.1046

sin36=0.24731

sin37=0.20483

sin38=0.56583

sin39=0.98375

sin40=0.65392

sin41=0.05073

sin42=0.88582

sin43=0.24985

sin44=0.89972

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sin45=0.65475

sin46=0.86511

sin47=0.91705

sin48=0.73941

sin49=0.27719

sin50=0.8978

sin51=0.69708

sin52=0.67219

sin53=0.72928

sin54=0.49474

sin55=0.89918

sin56=0.50417

sin57=0.54239

sin58=0.6426

sin59=0.21122

sin60=0.44386

sin61=0.93957

sin62=0.89269

sin63=0.83678

sin64=0.9167

sin65=0.66499

sin66=0.26009

sin67=0.24404

sin68=0.67873

sin69=0.72017

sin70=0.59083

sin71=0.93167

sin72=0.51535

sin73=0.30354

sin74=0.83189

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sin75=0.90683

sin76=0.59965

sin77=0.52352

sin78=0.38057

sin79=0.7664

sin80=0.2208

sin81=0.51378

sin82=0.15704

sin83=0.1322

sin84=0.82733

sin85=0.17455

sin86=0.98242

sin87=0.45738

sin88=0.90958

sin89=0.63913

sin90=1

cos1=0.63913

cos2=0.90958

cos3=0.45738

cos4=0.98242

cos5=0.17455

cos6=0.82733

cos7=0.1322

cos8=0.15704

cos9=0.51378

cos10=0.2208

cos11=0.7664

cos12=0.38057

cos13=0.52352

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cos14=0.59965

cos15=0.90683

cos16=0.83189

cos17=0.30355

cos18=0.51535

cos19=0.93168

cos20=0.59084

cos21=0.72017

cos22=0.67874

cos23=0.24404

cos24=0.26009

cos25=0.66499

cos26=0.9167

cos27=0.83679

cos28=0.8927

cos29=0.93957

cos30=0.44387

cos31=0.21123

cos32=0.6426

cos33=0.5424

cos34=0.50417

cos35=0.89918

cos36=0.49474

cos37=0.72928

cos38=0.67219

cos39=0.69709

cos40=0.8978

cos41=0.2772

cos42=0.73942

cos43=0.91705

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cos44=0.86512

cos45=0.65476

cos46=0.89974

cos47=0.24985

cos48=0.88582

cos49=0.05074

cos50=0.65394

cos51=0.98375

cos52=0.56583

cos53=0.20484

cos54=0.24731

cos55=0.10462

cos56=0.07468

cos57=0.50272

cos58=0.32049

cos59=0.00544

cos60=0.00001

cos61=0.63371

cos62=0.

cos63=0.95468

cos64=0.

cos65=0.

cos66=0.58004

cos67=0.92737

cos68=0.59122

cos69=0.

cos70=0.56688

cos71=0.

cos72=0.

cos73=0.

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.z.

cos74=0.

cos75=0.

cos76=0.

cos77=0.

cos78=0.

cos79=0.

cos80=0.

cos81=0.

cos82=0.

cos83=0.

cos84=0.

cos85=0.

cos86=0.

cos87=0.6

cos88=0.

cos89=0.72836

cos90=0

tan1=0.5

tan2=0.

tan3=0.6

tan4=0.

tan5=0.

tan6=0.

tan7=0.29046

tan8=0.

tan9=0.

tan10=0.

tan11=0.

tan12=0.00221

tan13=0.55631

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tan14=0.

tan15=0.11227

tan16=0.88079

tan17=0.

tan18=0.29063

tan19=0.

tan20=0.

tan21=0.54158

tan22=0.51568

tan23=0.96047

tan24=0.85361

tan25=0.49986

tan26=0.58614

tan27=0.44288

tan28=0.14788

tan29=0.2769

tan30=0.96257

tan31=0.75604

tan32=0.93275

tan33=0.75104

tan34=0.24265

tan35=0.97097

tan36=0.53609

tan37=0.27942

tan38=0.67174

tan39=0.50072

tan40=0.72799

tan41=0.62267

tan42=0.78399

tan43=0.76618

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tan44=0.70739

tan45=0.99999

tan46=1.05693

tan47=1.46826

tan48=1.91927

tan49=1.10092

tan50=1.421

tan51=1.5051

tan52=1.30785

tan53=1.04098

tan54=1.11733

tan55=1.21144

tan56=1.27403

tan57=1.45827

tan58=1.10506

tan59=1.05173

tan60=1.88767

tan61=1.14235

tan62=1.63318

tan63=1.51503

tan64=2.9296

tan65=2.95586

tan66=2.4215

tan67=2.3753

tan68=2.62946

tan69=2.38023

tan70=2.46216

tan71=2.5822

tan72=3.52526

tan73=3.41404

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tan74=3.09087

tan75=3.88776

tan76=4.58455

tan77=4.4153

tan78=4.8456

tan79=5.0307

tan80=5.7707

tan81=6.5041

tan82=7.4207

tan83=8.4593

tan84=9.2587

tan85=11.132

tan86=14.1942

tan87=19.816

tan88=28.5515

tan89=57.9144

tan90=(无限)

终于完了，本人冒着长针眼的危险整理出了这个东东

以下鸣百度文库上的资料：

./view/初中数学锐角

三角形讲解

./view/初中三角函数值表

./view/"edu_

arch=true计算器三角函数求值

还有百度知道：

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.z.

./question/三角函数表

以及数学课本和

提分教练里的资料

后话：

虽然说细数只借鉴了这么多，但是找资料的时候也费了很多时

间，网页的历史记录竟然已经到达５,６页了。

再次申明，本资料绝，仅供学习交流