HKDSE-MATH - 2012 - Paper 2 -

Ans: A
The locus of $P$ is a circle with centre $(20,12)$ and r

Ans: A
Let $P=(x,y)$.

$\begin{array}{rcl}
AP & = 

Ans: D
Note that the slopes of $L_1$ and $L_2$ are $\dfrac{-2

Ans: A
Note that there are two fixed points $A$ and $B$, and th

Ans: D
Note that the slope and the $y$-intercept of $L_1$ are

Ans: (b) (i) Angle bisector (ii) $8x-y-60=0$

1. Sketch $\Delt

Ans: D
Since $P$ is a moving point such that the perpendicula

Ans: A
Note that the intersection of the two straight lines i

Ans: C

Let $(x,y)$ be the coordinates of $P$. Then the equati

Ans: B

I is true. Note that the slopes of $\ell$ and $L$ are the