三角函数真值表

deg（角度°）

sinθ的真值

cosθ的真值

tanθ的真值

cotθ的真值

0°

00

.0000

1.0000

.0000

∞

90°

00

10

.0029

1.0000

.0029

343.77

89°

50

20

.0058

1.0000

.0058

171.89

40

30

.0087

1.0000

.0087

114.59

30

40

.0116

0.9999

.0116

85.940

20

50

.0145

.9999

.0145

68.750

10

1°

00

.0175

.9998

.0175

57.290

00

10

.0204

.9998

.0204

49.104

88°

50

20

.0233

.9997

.0233

42.964

40

30

.0262

.9997

.0262

38.188

30

40

.0291

.9996

.0291

34.368

20

50

.0320

.9995

.0320

31.242

10

2°

00

.0349

.9994

.0349

28.636

00

10

.0378

.9993

.0378

26.432

87°

50

20

.0407

.9992

.0407

24.542

40

30

.0436

.9990

.0437

22.904

30

40

.0465

.9989

.0466

21.470

20

50

.0494

.9988

.0495

20.206

10

3°

00

.0523

.9986

.0524

19.081

00

10

.0552

.9985

.0553

18.075

86°

50

20

.0581

.9983

.0582

17.169

40

30

.0610

.9981

.0612

16.350

30

40

.0640

.9980

.0641

15.605

20

50

.0669

.9978

.0670

14.924

10

4°

00

.0698

.9976

.0699

14.301

00

10

.0727

.9974

.0729

13.727

85°

50

20

.0756

.9971

.0758

13.197

40

30

.0785

.9969

.0787

12.706

30

40

.0814

.9967

.0816

12.251

20

50

.0843

.9964

.0846

11.826

10

5°

00

.0872

.9962

.0875

11.430

00

10

.0901

.9959

.0904

11.059

84°

50

20

.0929

.9957

.0934

10.712

40

30

.0958

.9954

.0963

10.385

30

40

.0987

.9951

.0992

10.078

20

50

.1016

.9948

.1022

9.7882

10

6°

00

.1045

.9945

.1051

9.5144

00

10

.1074

.9942

.1080

9.2553

83°

50

20

.1103

.9939

.1110

9.0098

40

30

.1132

.9936

.1139

8.7769

30

40

.1161

.9932

.1169

8.5555

20

50

.1190

.9929

.1198

8.3450

10

7°

00

.1219

.9925

.1228

8.1443

00

10

.1248

.9922

.1257

7.9530

82°

50

20

.1276

.9918

.1287

7.7704

40

30

.1305

.9914

.1317

7.5958

30

40

.1334

.9911

.1346

7.4287

20

50

.1363

.9907

.1376

7.2687

10

8°

00

.1392

.9903

.1405

7.1154

00

10

.1421

.9899

.1435

6.9682

81°

50

20

.1449

.9894

.1465

6.8269

40

30

.1478

.9890

.1495

6.6912

30

40

.1507

.9886

.1524

6.5606

20

50

.1536

.9881

.1554

6.4348

10

9°

00

.1564

.9877

.1584

6.3138

00

10

.1593

.9872

.1614

6.1970

80°

50

20

.1622

.9868

.1644

6.0844

40

30

.1650

.9863

.1673

5.9758

30

40

.1679

.9858

.1703

5.8708

20

50

.1708

.9853

.1733

5.7694

10

10°

00

.1736

.9848

.1763

5.6713

00

10

.1765

.9843

.1793

5.5764

79°

50

20

.1794

.9838

.1823

5.4845

40

30

.1822

.9833

.1853

5.3955

30

40

.1851

.9827

.1883

5.3093

20

50

.1880

.9822

.1914

5.2257

10

11°

00

.1908

.9816

.1944

5.1446

00

10

.1937

.9811

.1974

5.0658

78°

50

20

.1965

.9805

.2004

4.9894

40

30

.1994

.9799

.2035

4.9152

30

40

.2022

.9793

.2065

4.8430

20

50

.2051

.9787

.2095

4.7729

10

cosθ的真值

sinθ的真值

cotθ的真值

tanθ的真值

deg（角度°）

deg（角度）＝78°10’～90°00’时

θ

deg（角度°）

sinθ的真值

cosθ的真值

tanθ的真值

cotθ的真值

12°

00

.2079

.9781

.2126

4.7046

78°

00

10

.2108

.9775

.2156

4.6382

77°

50

20

.2136

.9769

.2186

4.5736

40

30

.2164

.9763

.2217

4.5107

30

40

.2193

.9757

.2247

4.4494

20

50

.2221

.9750

.2278

4.3897

10

13°

00

.2250

.9744

.2309

4.3315

00

10

.2278

.9737

.2339

4.2747

76°

50

20

.2306

.9730

.2370

4.2193

40

30

.2334

.9724

.2401

4.1653

30

40

.2363

.9717

.2432

4.1126

20

50

.2391

.9710

.2462

4.0611

10

14°

00

.2419

.9703

.2493

4.0108

00

10

.2447

.9696

.2524

3.9617

75°

50

20

.2476

.9689

.2555

3.9136

40

30

.2504

.9681

.2586

3.8667

30

40

.2532

.9674

.2617

3.8208

20

50

.2560

.9667

.2648

3.7760

10

15°

00

.2588

.9659

.2679

3.7321

00

10

.2616

.9652

.2711

3.6891

74°

50

20

.2644

.9644

.2742

3.6470

40

30

.2672

.9636

.2773

3.6059

30

40

.2700

.9628

.2805

3.5656

20

50

.2728

.9621

.2836

3.5261

10

16°

00

.2756

.9613

.2867

3.4874

00

10

.2784

.9605

.2899

3.4495

73°

50

20

.2812

.9596

.2931

3.4124

40

30

.2840

.9588

.2962

3.3759

30

40

.2868

.9580

.2994

3.3402

20

50

.2896

.9572

.3026

3.3052

10

17°

00

.2924

.9563

.3057

3.2709

00

10

.2952

.9555

.3089

3.2371

72°

50

20

.2979

.9546

.3121

3.2041

40

30

.3007

.9537

.3153

3.1716

30

40

.3035

.9528

.3185

3.1397

20

50

.3062

.9520

.3217

3.1084

10

18°

00

.3090

.9511

.3249

3.0777

00

10

.3118

.9502

.3281

3.0475

71°

50

20

.3145

.9492

.3314

3.0178

40

30

.3173

.9483

.3346

2.9887

30

40

.3201

.9474

.3378

2.9600

20

50

.3228

.9465

.3411

2.9319

10

19°

00

.3256

.9455

.3443

2.9042

00

10

.3283

.9446

.3476

2.8770

70°

50

20

.3311

.9436

.3508

2.8502

40

30

.3338

.9426

.3541

2.8239

30

40

.3365

.9417

.3574

2.7980

20

50

.3393

.9407

.3607

2.7725

10

20°

00

.3420

.9397

.3640

2.7475

00

10

.3448

.9387

.3673

2.7228

69°

50

20

.3475

.9377

.3706

2.6985

40

30

.3502

.9367

.3739

2.6746

30

40

.3529

.9356

.3772

2.6511

20

50

.3557

.9346

.3805

2.6279

10

21°

00

.3584

.9336

.3839

2.6051

00

10

.3611

.9325

.3872

2.5826

68°

50

20

.3638

.9315

.3906

2.5605

40

30

.3665

.9304

.3939

2.5386

30

40

.3692

.9293

.3973

2.5172

20

50

.3719

.9283

.4006

2.4960

10

22°

00

.3746

.9272

.4040

2.4751

00

10

.3773

.9261

.4074

2.4545

67°

50

20

.3800

.9250

.4108

2.4342

40

30

.3827

.9239

.4142

2.4142

30

40

.3854

.9228

.4176

2.3945

20

50

.3881

.9216

.4210

2.3750

10

23°

00

.3907

.9205

.4245

2.3559

00

10

.3934

.9194

.4279

2.3369

66°

50

20

.3961

.9182

.4314

2.3183

40

30

.3987

.9171

.4348

2.2998

30

40

.4014

.9159

.4383

2.2817

20

50

.4041

.9147

.4417

2.2637

10

cosθ的真值

sinθ的真值

cotθ的真值

tanθ的真值

deg（角度°）

deg（角度）＝66°10’～78°00’时

θ

deg（角度°）

sinθ的真值

cosθ的真值

tanθ的真值

cotθ的真值

24°

00

.4067

.9135

.4452

2.2460

66°

00

10

.4094

.9124

.4487

2.2286

65°

50

20

.4120

.9112

.4522

2.2113

40

30

.4147

.9100

.4557

2.1943

30

40

.4173

.9088

.4592

2.1775

20

50

.4200

.9075

.4628

2.1609

10

25°

00

.4226

.9063

.4663

2.1445

00

10

.4253

.9051

.4699

2.1283

64°

50

20

.4279

.9038

.4734

2.1123

40

30

.4305

.9026

.4770

2.0965

30

40

.4331

.9013

.4806

2.0809

20

50

.4358

.9001

.4841

2.0655

10

26°

00

.4384

.8988

.4877

2.0503

00

10

.4410

.8975

.4913

2.0353

63°

50

20

.4436

.8962

.4950

2.0204

40

30

.4462

.8949

.4986

2.0057

30

40

.4488

.8936

.5022

1.9912

20

50

.4514

.8923

.5059

1.9768

10

27°

00

.4540

.8910

.5095

1.9626

00

10

.4566

.8897

.5132

1.9486

62°

50

20

.4592

.8884

.5169

1.9347

40

30

.4617

.8870

.5206

1.9210

30

40

.4643

.8857

.5243

1.9074

20

50

.4669

.8843

.5280

1.8940

10

28°

00

.4695

.8829

.5317

1.8807

00

10

.4720

.8816

.5354

1.8676

61°

50

20

.4746

.8802

.5392

1.8546

40

30

.4772

.8788

.5430

1.8418

30

40

.4797

.8774

.5467

1.8291

20

50

.4823

.8760

.5505

1.8165

10

29°

00

.4848

.8746

.5543

1.8040

00

10

.4874

.8732

.5581

1.7917

60°

50

20

.4899

.8718

.5619

1.7796

40

30

.4924

.8704

.5658

1.7675

30

40

.4950

.8689

.5696

1.7556

20

50

.4975

.8675

.5735

1.7437

10

30°

00

.5000

.8660

.5774

1.7321

00

10

.5025

.8646

.5812

1.7205

59°

50

20

.5050

.8631

.5851

1.7090

40

30

.5075

.8616

.5890

1.6977

30

40

.5100

.8601

.5930

1.6864

20

50

.5125

.8587

.5969

1.6753

10

31°

00

.5150

.8572

.6009

1.6643

00

10

.5175

.8557

.6048

1.6534

58°

50

20

.5200

.8542

.6088

1.6426

40

30

.5225

.8526

.6128

1.6319

30

40

.5250

.8511

.6168

1.6212

20

50

.5275

.8496

.6208

1.6107

10

32°

00

.5299

.8480

.6249

1.6003

00

10

.5324

.8465

.6289

1.5900

57°

50

20

.5348

.8450

.6330

1.5798

40

30

.5373

.8434

.6371

1.5697

30

40

.5398

.8418

.6412

1.5597

20

50

.5422

.8403

.6453

1.5497

10

33°

00

.5446

.8387

.6494

1.5399

00

10

.5471

.8371

.6536

1.5301

56°

50

20

.5495

.8355

.6577

1.5204

40

30

.5519

.8339

.6619

1.5108

30

40

.5544

.8323

.6661

1.5013

20

50

.5568

.8307

.6703

1.4919

10

34°

00

.5592

.8290

.6745

1.4826

00

10

.5616

.8274

.6787

1.4733

55°

50

20

.5640

.8258

.6830

1.4641

40

30

.5664

.8241

.6873

1.4550

30

40

.5688

.8225

.6916

1.4460

20

50

.5712

.8208

.6959

1.4370

10

35°

00

.5736

.8192

.7002

1.4281

00

10

.5760

.8175

.7046

1.4193

54°

50

20

.5783

.8158

.7089

1.4106

40

30

.5807

.8141

.7133

1.4019

30

40

.5831

.8124

.7177

1.3934

20

50

.5854

.8107

.7221

1.3848

10

cosθ的真值

sinθ的真值

cotθ的真值

tanθ的真值

deg（角度°）

deg（角度）＝54°10’～66°00’时

θ

deg（角度°）

sinθ的真值

cosθ的真值

tanθ的真值

cotθ的真值

36°

00

.5878

.8090

.7265

1.3764

54°

00

10

.5901

.8073

.7310

1.3680

53°

50

20

.5925

.8056

.7355

1.3597

40

30

.5948

.8039

.7400

1.3514

30

40

.5972

.8021

.7445

1.3432

20

50

.5995

.8004

.7490

1.3351

10

37°

00

.6018

.7986

.7536

1.3270

00

10

.6041

.7969

.7581

1.3190

52°

50

20

.6065

.7951

.7627

1.3111

40

30

.6088

.7934

.7673

1.3032

30

40

.6111

.7916

.7720

1.2954

20

50

.6134

.7898

.7766

1.2876

10

38°

00

.6157

.7880

.7813

1.2799

00

10

.6180

.7862

.7860

1.2723

51°

50

20

.6202

.7844

.7907

1.2647

40

30

.6225

.7826

.7954

1.2572

30

40

.6248

.7808

.8002

1.2497

20

50

.6271

.7790

.8050

1.2423

10

39°

00

.6293

.7771

.8098

1.2349

00

10

.6316

.7753

.8146

1.2276

50°

50

20

.6338

.7735

.8195

1.2203

40

30

.6361

.7716

.8243

1.2131

30

40

.6383

.7698

.8292

1.2059

20

50

.6406

.7679

.8342

1.1988

10

40°

00

.6428

.7660

.8391

1.1918

00

10

.6450

.7642

.8441

1.1847

49°

50

20

.6472

.7623

.8491

1.1778

40

30

.6494

.7604

.8541

1.1708

30

40

.6517

.7585

.8591

1.1640

20

50

.6539

.7566

.8642

1.1571

10

41°

00

.6561

.7547

.8693

1.1504

00

10

.6583

.7528

.8744

1.1436

48°

50

20

.6604

.7509

.8796

1.1369

40

30

.6626

.7490

.8847

1.1303

30

40

.6648

.7470

.8899

1.1237

20

50

.6670

.7451

.8952

1.1171

10

42°

00

.6691

.7431

.9004

1.1106

00

10

.6713

.7412

.9057

1.1041

47°

50

20

.6734

.7392

.9110

1.0977

40

30

.6756

.7373

.9163

1.0913

30

40

.6777

.7353

.9217

1.0850

20

50

.6799

.7333

.9271

1.0786

10

43°

00

.6820

.7314

.9325

1.0724

00

10

.6841

.7294

.9380

1.0661

46°

50

20

.6862

.7274

.9435

1.0599

40

30

.6884

.7254

.9490

1.0538

30

40

.6905

.7234

.9545

1.0477

20

50

.6926

.7214

.9601

1.0416

10

44°

00

.6947

.7193

.9657

1.0355

00

10

.6967

.7173

.9713

1.0295

45°

50

20

.6988

.7153

.9770

1.0235

40

30

.7009

.7133

.9827

1.0176

30

40

.7030

.7112

.9884

1.0117

20

50

.7050

.7092

.9942

1.0058

10

45°

00

.7071

.7071

1.0000

1.0000

00

cosθ的真值

sinθ的真值

cotθ的真值

tanθ的真值

deg（角度°）

deg（角度）＝45°00’～54°00’时

θ

①    请选择真值表左侧的θ栏，找到deg（角度°）。

②    确认记载在真值表上方的三角函数种类，计算出目标deg（角度°）的真值。

ex.)    sin 5°＝ 0.0872

          cos5°＝ 0.9962

          tan5°＝ 0.0875

          cot5°＝11.430

deg（角度）为45°00′～90°00′时

①    请选择真值表右侧的θ栏，找到deg（角度°）。

②    确认记载在真值表下方的三角函数种类，计算出目标deg（角度°）的真值。

ex.)    sin 85°＝ 0.9962

          cos85°＝ 0.0872

          tan85°＝11.430

          cot85°＝ 0.0875

当deg（角度°）包含小数点以下的部分时，请换算为度°分′之后再使用。

ex.) 5.5°表示5°30′（5度30分）。（1度＝60分）