Jika (p,q)\left(p,q\right)(p,q) merupakan titik singgung lingkaran (x−1)2+(y+1)2=4\left(x-1\right)^2+\left(y+1\right)^2=4(x−1)2+(y+1)2=4 maka persamaan garis singgungnya adalah ....
(p−1)x−(q+1)y−p+q=2\left(p-1\right)x-\left(q+1\right)y-p+q=2(p−1)x−(q+1)y−p+q=2
(p−1)x+(q+1)y−p+q=2\left(p-1\right)x+\left(q+1\right)y-p+q=2(p−1)x+(q+1)y−p+q=2
(p−1)x+(q−1)y+p+q=2\left(p-1\right)x+\left(q-1\right)y+p+q=2(p−1)x+(q−1)y+p+q=2
(p−1)x+(q+1)y−p−q=2\left(p-1\right)x+\left(q+1\right)y-p-q=2(p−1)x+(q+1)y−p−q=2
(q−1)x+(p+1)y−p+q=2\left(q-1\right)x+\left(p+1\right)y-p+q=2(q−1)x+(p+1)y−p+q=2