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tAn Cos sin数值表

sin30=1/2,sin60=二分之根号三,sin90=1cos30=sin60,cos60=sin30,cos90=0tan45=1,tan60=根号三,tan30=三分之根号三.

(1)sin0=0,sin90=1,sin120=0.87,sin150=0.5,sin180=0(2)cos0=1,cos90=0,cos120=-0.5,cos150=-0.87,cos180=-1(3)tan0=0,tan90无意义,tan120=-1.73,tan150=-0.58,tan180=0

sin(0,30,45,60,90)=0,1/2,根号2/2,根号3/2,1cos(0,30,45,60,90)=1,根号3/2,根号2/2,1/2,0tan(0,30,45,60,90)=0,根号3/3,1,根号3,不存在

0° 30° 45° 60° 90° 0 1/2 √2/2 √3/2 1 ← sinA 1 √3/2 √2/2 1/2 0 ← cosA 0 √3/3 1 √3 None ← tanA None √3 1 √3/3 0 ← cotA

SIN60=COS30=(√3)/2 SIN45=COS45=(√2)/2 SIN30=COS60=1/2 TAN30=COT60=(√3)/3 TAN45=COT45= 1 TAN60=COT30= √3

(1)特殊角三角函数值 sin0=0 sin30=0.5 sin45=0.7071 二分之根号2 sin60=0.8660 二分之根号3 sin90=1 cos0=1 cos30=0.866025404 二分之根号3 cos45=0.707106781 二分之根号2 cos60

a sin cos tan0 0 1 030 1/2 √3/2 √3/345 √2/2 √2/2 160 √3/2 1/2 √390 1 0 ∞120 √3/2 -1/2 -√3135 √2/2 -√2/2 -1150 1/2 -√3/2 -√3/3180 0 -1 0

sin(0,30,45,60,90)=0,1/2,根号2/2,根号3/2,1 cos(0,30,45,60,90)=1,根号3/2,根号2/2,1/2,0 tan(0,30,45,60,90)=0,根号3/3,1,根号3,不存在

sin 0 =0 sin30 =1/2 sin45= √ 2/2 sin 60 = √ 3/2 sin 90 = 1 cos0=1 cos30=√ 3/2 cos25=√ 2/2 cos 60=√ 2/2 cos90 =0 tan0 =0 tan30=√ 3/3 tan45 =1 tan60=√ 3 tan90 不存在 cot o 不存在 cot 30=√ 3 cot 45=2 cot 60=√ 3/3 cot90=0 望采纳

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