Question

Matematika wajib kelas 11
tolong bantu kerjakan nomor 3 saja ya :)
pakai cara agar aku paham...
makasih banyak

ngasal? maaf block n report :(

Answer 1

No 3)

Berarti :

[x',y'] = [cos 90, -sin 90, -sin 90, cos 90] [x,y] =

[x',y'] = [0,-1,-1,0] [x,y]

[x,y'] = [-y, -x]

x' = -y --> y = -x'

y' = -x --> x = -y'

Bayangan garisnya :

y = 4x - 1

-x' = 4(-y') - 1

-x' = -4y' - 1

-x + 4y + 1 = 0

x - 4y - 1 = 0