Matematika
(x - 2)² + (y - 4)² = 2
x² - 4x + 4 + y² - 8y + 16 - 2 = 0
x² + y² - 4x - 8y + 18 = 0
A = -4
B = -8
C = 18
x1 = 1
y1 = 5
Persamaan garis singgung lingkaran
xx1+yy1+A/2(x+x1)+B/2(y+y1)+C=0
x + 5y + (-4/2)(x+1) + (-8/2)(y+5)+18=0
x + 5y - 2x - 2 - 4y - 20 + 18 = 0
-x + y - 4 = 0
x - y + 4 = 0
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Matematika
(x - 2)² + (y - 4)² = 2
x² - 4x + 4 + y² - 8y + 16 - 2 = 0
x² + y² - 4x - 8y + 18 = 0
A = -4
B = -8
C = 18
x1 = 1
y1 = 5
Persamaan garis singgung lingkaran
xx1+yy1+A/2(x+x1)+B/2(y+y1)+C=0
x + 5y + (-4/2)(x+1) + (-8/2)(y+5)+18=0
x + 5y - 2x - 2 - 4y - 20 + 18 = 0
-x + y - 4 = 0
x - y + 4 = 0