Mathematics
Senior High
Resolved
๐กใๅ้กใงใใ
๐ ใชใฌใณใธใใผใซใฎ้จๅใ็่งฃใงใใพใใ
PR (1), (2)
2125
(3),(4)1 20 ็ฏๅฒใงใใใ
ๆๅฐๅคใๆฑใใใ ใพใ, ใใฎใจใใฎ0ใฎๅคใๆฑใใใ
(1) y=sin'0-2sin0+2
(3) y=-cos20-โ3 sin
(2)y=cos20+cos0
(4) y=sin0+โ2 cost
(1)int ใจใใใจ,0โฆ02ฯใงใใใใ
ใtใง่กจใใจ y=t-2t+2
ใใฃใฆ y=(t-1)2+1
-1โฆtโฆ1 ใฎ็ฏๅฒใง,yใฏ
-1โค1โค1
t=-1ใงๆๅคงๅค5,
t=1 ใงๆๅฐๅค1
ใใจใใ
-10 1
t
ใพใ,0โฆ02ใงใใใใ
3
t=-1 ใจใชใใจใ, sin0=-1 ใใ
0= ฯ
2
t=1 ใจใชใใจใ, sin0=1 ใใ
0=
2
3
ใใใซ,ไธใใใใ้ขๆฐใฏ,0=1ใงๆๅคงๅค5,
07ใงๆๅฐๅค1ใใจใใ
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