sina=a/c cosa= b/c tga=a/b ctga=b/a
a
c
ctga=
tga=-
sin2a+cos2a=1 cosa
sina
sina.
cosa
tga*ctga=1 { gdy cosa^O i sina^O}
sin2a=2sinacosa
cos2a = cos^-sirPa = 1-2sin2a. = 2cos2a-1
tq2a= lady coscł#0 i cos2as*0 }
* 1-tg2a ia J J
2ctq2a-1
ctg2a= { gdy sina#0 i sin2a#0 }
sin3a=sina(3cos2a-sin2a)=sina(3-4sin2a)
cos3a=cosa(cos2a-3sin2a)=cosa(4cos2a-3)
tg3a= { gdy cosa#0 i cos3a#0 }
ctg3a=C^!3 f''' { gdy sina#0 i sin3a#0 }
1-cosa
2
• yOC, X
sin(y)=+-
,a ,
cos(y )=+-
1+cosa
2
{+ - zależy od ćwiartki}
a
1-cosa
sina
1+cosa
sina
{ gdy sirnx#0 }
{gdy cosa*cos|3#0 i cos(a.+|3)#0} { gdy sina*sin|3#0 i sin(a.+|3)#0}
{ gdy cosa*cos|3#0 i cos(a.-|3)#0}
{ gdy sina*sin|3#0 i cos(a.-|3)#0}
sin(a+|3)=sinacos|3+cosasin|3 sin(a-|3)=sinacos|3-cosasin|3 cos(a+|3)=cosacos|3-sinasin|3 cos(a-|3)=cosacos|3+sinasin|3 tg (a+p)=(tga+tg p)/(1 -tgatg p) tg (a- p)=(tga-tg |E)/(1 +tgatg |E)
ctg(a+H=«M
av ctga+ctgp
ctg(a-H= «S±1) av ctgp-ctga'
sina+sinp=2sin *cos^^ sina-sin|3=2sin *cos^7p cosa+cos|3=2cos *cos^^ cosa-cos|E=-2sin^7p *cos^7p
col*cosf} { gdp co“*cosfi#0 >
*0“^= cona { gdp 8irtt*8infW1}
ctga+ctgS= s'n(^+^) { gdp. cosa*cos|3#0 }
* ^ sina*sin|3 1 a ^ ^ J
ctga-ctgS= s'n(ft~cx) { gd p. sina*sin|3#0 }
* ^ sina*sin|3 1 a ^ ^ J
1
sin2a = (1-cos2a)
1
cos2a= 2" (1+cos2a)
1
sinxcosx = 2" (sin2x)
1
sinaa*cosba = [sin(a+b) a+sin(a-b) a]
1
sinaa*sinba = [cos(a-b) a-cos(a+b) a]
1
cosaa*cosba = [cos(a+b) a+cos(a-b) a]
a2=|32+c2-2|3c cosa |32=a2+c2-2ac cosp. c2=a2+|32-2a|3 cosy cos(- a)=cos sin(-a)=-sina tg(-a)=-tga ctg(-a)=-ctga
X |
0 |
71/6 |
71/4 |
71/3 |
71/2 |
TU |
3 271 |
271 |
0° |
30° |
45° |
60° |
90° |
180° |
270° |
360° | |
sinx |
0 |
1/2 |
V2/2 |
V3/2 |
1 |
0 |
-1 |
0 |
cosx |
1 |
V3/2 |
V2/2 |
1/2 |
0 |
-1 |
0 |
1 |
tgx |
0 |
V3/3 |
1 |
V3 |
brak |
0 |
bark |
0 |
ctgx |
brak |
V3 |
1 |
V3/3 |
0 |
brak |
0 |
brak |
Tabela znaków funkcji tryton, w poszczególnych ćwiartkach:
IV
sina
cosa
tga
ctga
+ |
+ |
- |
- |
+ |
_ |
_ |
+ |
+ |
- |
+ |
- |
+ |
- |
+ |
- |
1 ćwiart |
II ćwiartka |
III ćwiartka |
IV ćwiartka | ||||
♦ |
tu/2 - a |
71/2+a |
Ti - a |
71 + a |
3/2ti - a |
3/271 + a |
271-a |
sin4> |
cos a |
cos a |
sin a |
- sin a |
- cos a |
- cos a |
- sin a |
cos4> |
sin a |
- sin a |
- cos a |
- cos a |
- sin a |
sin a |
cos a |
tg+ |
ctg a |
- ctg a |
-tg a |
tg a |
ctg a |
- ctg a |
-tg a |
ctg4> |
tq a |
- tq a |
- ctq a |
ctq a |
tq a |
- tq a |
- ctq a |