Question

Tolong bantu dong, dari kemarin aku gk bisa:) please aku minta bantuannya yang bisa

Answer 1

Rotasi [0,-90] berarti diputer 90 drajat searah jarum jam

Jadi :

[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 --> x = -y'

Bayangan garis :

3x + 2y - 6 = 0

3(-y') + 2x' - 6 = 0

-3y' + 2x' - 6 = 0

2x -3y - 6 = 0

Oke ??