Question

Tolong Jawab No 19 dan 21
Memakai Cara

Answer 1

1.
x= 3
r = 5
y = √r²-x²
y = 4
 kemiringan m = tan x = y/x = 4/3

2.
misal garis q melalui  A (0, -2) dan B (3,0)
q => (y-y1)./(y2-y1) = (x-x1)/(x2- x1)
q => (y+2)/(2) = (x-0)/(3-0)
q => y + 2 = 2x /3
q => 3y + 6 = 2x
q => 2x - 3y = 6
garis p tegak lurus garis q melalui C(3,0)
p => 3x + 2y = 3(3) + 2(0)
3x + 2y = 9
atau
2y = -3x + 9