10 анги тригонометрийн функц нийлбэр ялгаварын томъёо
TRANSCRIPT
- 1. 79-
- -10
2.
- 10
- ,
sin( +)=sin cos+cos sin , sin( -)=sin cos-cos sin cos( +)=cos cos-sin sin cos( -)=cos cos+sin sin 3.
- .
- YOUR SUBTOPICS GO HERE
4.
- sin +sin =?
- =x+y =x-y , sin +sin =sin (x+y) +sin (x-y)=sinxcos y +cos x siny+sin xcosy-cosxsiny=2 sinxcos y x+y= x-y= 2 x=(+)/2 . y=(-)/2 . :sin +sin =2 sinxcos y=2 sin (+)/2 cos (-)/2
- sin +sin =2 sin (+)/2 cos (-)/2(1)
5.
- sin - sin =?
- sin - sin =sin (x+y)- sin (x-y)=sinxcos y +cos x siny-sin xcosy+cosxsiny== 2cos xsin y sin - sin = 2cos xsin y= 2C os (+)/2 Sin (-)/2
- sin - sin =2C os (+)/2 Sin (-)/2(2)
. 6. cos- ?
- cos + cos =2C os (+)/2 Cos (-)/2(3)
- Cos-Cos=2sin(+)/2Sin(-)/2(4)
7. tg +tg =Sin( + )/Cos Cos (5) tg- tg =Sin( - )/Cos Cos (6) ctg+c tg = Sin( + )/Sin Sin (7) ctg-c tg = Sin( - )/Sin Sin (8) 8. 1 Sin10 +sin50 Sin10 +sin50 = =2sin(10 +50)/2Cos( 10 -50)/2= =2sin30Cos20= =21/2Cos20= =Cos20 ; 9. 2 Cos( + ) Cos( - )-Sin( + ) Sin ( - )=? Cos( + ) Cos( - )-Sin( + ) Sin ( - )= =Cos( + + - )= =Cos2 ; , , ! 10. !
- sin(150 )=?
11. cos(225 )=? 12. sin2 =? 13. sin(45 +x) cos(x-45 )-cos(45 +x) sin (x-45 )=? 14. sin(30 +x) cosx - cos(30 +x ) sinx=? 15. cos(60 +x) cosx + sin(60 +x ) sinx=? sin, cos,tg, ctg??? 16.
- -42
17. 1-20 18. -92, 480-490 ... 19. . .