三角函数表值对照表(三角函数表值对照表格)

三角函数表值对照表？

常用三角函数值对照表

sin0=sin0°=0

cos0=cos0°=1

tan0=tan0°=0sin15=0.650；

sin15°=0.259

cos15=-0.759；cos15°=0.966

tan15=-0.855；tan15°=0.268

sin30°=1/2

cos30°=0.866；

tan30°=0.577；

sin45°=0.707；

cos45°=0.707

tan45=1.620；tan45°=1

sin60=-0.305；sin60°=0.866

cos60=-0.952；cos60°=1/2

tan60=0.320；tan60°=1.732

sin75=-0.388；sin75°=0.966

cos75=0.922；cos75°=0.259

tan75=-0.421；tan75°=sin75°/cos75°=3.732

sin90=0.894；sin90°=cos0°=1

cos90=-0.448；cos90°=sin0°=0

tan90=-1.995；tan90°不存在

sin105=-0.971；sin105°=cos15°

cos105=-0.241；cos105°=-sin15°

tan105=4.028；tan105°=-cot15°

sin120=0.581；sin120°=cos30°

cos120=0.814；cos120°=-sin30°

tan120=0.713；tan120°=-tan60°

sin135=0.088；sin135°=sin45°

cos135=-0.996；cos135°=-cos45°

tan135=-0.0887；tan135°=-tan45°

sin150=-0.7149；sin150°=sin30°

cos150=-0.699；cos150°=-cos30°

tan150=-1.022；tan150°=-tan30°

sin165=0.998；sin165°=sin15°

cos165=-0.066；cos165°=-cos15°

tan165=-15.041；tan165°=-tan15°

sin180=-0.801；sin180°=sin0°=0

cos180=-0.598；cos180°=-cos0°=-1

tan180=1.339；tan180°=0

sin195=0.219；sin195°=-sin15°

cos195=0.976；cos195°=-cos15°

tan195=0.225；tan195°=tan15°

sin360=0.959；sin360°=sin0°=0

cos360=-0.284；cos360°=cos0°=1

tan360=-3.380；tan360°=tan0°=0

特殊角三角函数值

sin1=0.01745240643728351

sin2=0.03489949670250097

sin3=0.05233595624294383

sin4=0.0697564737441253

sin5=0.08715574274765816

sin6=0.10452846326765346

sin7=0.12186934340514747

sin8=0.13917310096006544

sin9=0.15643446504023087

sin10=0.17364817766693033

sin11=0.1908089953765448

sin12=0.20791169081775931

sin13=0.22495105434386497

sin14=0.24192189559966773

sin15=0.25881904510252074

sin16=0.27563735581699916

sin17=0.2923717047227367

sin18=0.3090169943749474

sin19=0.3255681544571567

sin20=0.3420201433256687

sin21=0.35836794954530027

sin22=0.374606593415912

sin23=0.3907311284892737

sin24=0.40673664307580015

sin25=0.42261826174069944

sin26=0.4383711467890774

sin27=0.45399049973954675

sin28=0.4694715627858908

sin29=0.48480962024633706

sin30=0.49999999999999994

cos1=0.9998476951563913

cos2=0.9993908270190958

cos3=0.9986295347545738

cos4=0.9975640502598242

cos5=0.9961946980917455

cos6=0.9945218953682733

cos7=0.992546151641322

常用三角函数值表？

常用三角函数公式有哪些

两角和公式

sin(A+B)=sinAcosB+cosAsinB

sin(A-B)=sinAcosB-cosAsinB

cos(A+B)=cosAcosB-sinAsinB

cos(A-B)=cosAcosB+sinAsinB

tan(A+B)=(tanA+tanB)/(1-tanAtanB)

tan(A-B)=(tanA-tanB)/(1+tanAtanB)

cot(A+B)=(cotAcotB-1)/(cotB+cotA)

cot(A-B)=(cotAcotB+1)/(cotB-cotA)

倍角公式

tan2A=2tanA/(1-tan2A)

Sin2A=2SinA?CosA

Cos2A=Cos^2A–Sin2A

=2Cos2A—1

=1—2sin^2A

三倍角公式

sin3A=3sinA-4(sinA)3;

cos3A=4(cosA)3-3cosA

tan3a=tana?tan(π/3+a)?tan(π/3-a)

半角公式

sin(A/2=√{(1–cosA)/2}

cos(A/2)=√{(1+cosA)/2}

tan(A/2)=√{(1–cosA)/(1+cosA)}

cot(A/2)=√{(1+cosA)/(1-cosA)}

tan(A/2)=(1–cosA)/sinA=sinA/(1+cosA)

和差化积

sin(a)+sin(b)=2sin[(a+b)/2]cos[(a-b)/2]

sin(a)-sin(b)=2cos[(a+b)/2]sin[(a-b)/2]

cos(a)+cos(b)=2cos[(a+b)/2]cos[(a-b)/2]

cos(a)-cos(b)=-2sin[(a+b)/2]sin[(a-b)/2]

tanA+tanB=sin(A+B)/cosAcosB

积化和差

sin(a)sin(b)=-1/2*[cos(a+b)-cos(a-b)]

cos(a)cos(b）=1/2*[cos(a+b)+cos(a-b)]

sin(a)cos(b)1/2*[sin(a+b)+sin(a-b)]

cos(a)sin(b)1/2*[sin(a+b)-sin(a-b)]

三角函数值表完整版？

sin0=sin0°=0

cos0=cos0°=1

tan0=tan0°=0

sin15=0.650；sin15°=（√6-√2）/4

cos15=-0.759；cos15°=（√6+√2）/4

tan15=-0.855；tan15°=2-√3

sin30=-0.988；sin30°=1/2

cos30=0.154；cos30°=√3/2

tan30=-6.405；tan30°=√3/3

sin45=0.851；sin45°=√2/2

cos45=0.525；cos45°=sin45°=√2/2