2012PP-II-21
Ans: C
Join $OB$ and $OC$. Let $\angle COD = x$.
… Read Join $OB$ and $OC$. Let $\angle COD = x$.
$\because \ov
HKDSE-MATH - 2012PP - Paper 2
2012PP-II-22
Ans: B
In $\Delta ABE$,
… Read In $\Delta ABE$,
$\because AB=AE$,
$\therefore \ang
2012PP-II-23
Ans: C
$\begin{array}{cl}
& \dfrac{30}{3\sin^2\th
… Read $\begin{array}{cl}
& \dfrac{30}{3\sin^2\th
2012PP-II-24
Ans: D
I has rotational symmetry and reflectional symmetry
… Read I has rotational symmetry and reflectional symmetry
2012PP-II-25
Ans: B
Note that the distance between the point $(-2,-1)$ an
… Read Note that the distance between the point $(-2,-1)$ an
2012PP-II-26
Ans: D
Let $P=(x,x+2)$.
… Read Let $P=(x,x+2)$.
$\begin{array}{rcl}
AP & = &#
2012PP-II-27
Ans: B
Rewrite the equation of the circle to general form, we
… Read Rewrite the equation of the circle to general form, we
2012PP-II-28
Ans: A
$P\text{(the sum is a multiple of $4$)}$
… Read $P\text{(the sum is a multiple of $4$)}$
$\begin{arr
2012PP-II-29
Ans: B
I is false. The height of the tallest student is $185\m
… Read I is false. The height of the tallest student is $185\m
2012PP-II-30
Ans: C
I is false. $m_2m_1$.
… Read I is false. $m_2m_1$.
II is true. The largest score of $
2012PP-II-31
Ans: D
$g(x)=2f(x)$ means $f(x)$ is enlarged along $y$-axi
… Read $g(x)=2f(x)$ means $f(x)$ is enlarged along $y$-axi
2012PP-II-32
Ans: B
$\begin{array}{cl}
& \mbox{B}0~000~000~023
… Read $\begin{array}{cl}
& \mbox{B}0~000~000~023
2012PP-II-33
Ans: C
Note that $\alpha + \beta = k$ and $\alpha\beta = 3$. He
… Read Note that $\alpha + \beta = k$ and $\alpha\beta = 3$. He
2012PP-II-34
Ans: D
$\begin{array}{cl}
& (x+3i)(3+i) \\
= & 3
… Read $\begin{array}{cl}
& (x+3i)(3+i) \\
= & 3
2012PP-II-35
Ans: A
Note that the sequence is an arithmetic sequence, and
… Read Note that the sequence is an arithmetic sequence, and
2012PP-II-36
Ans: B
$\begin{array}{rcl}
a & = & \log_{12} b \\
… Read $\begin{array}{rcl}
a & = & \log_{12} b \\
2012PP-II-37
Ans: A
$\begin{array}{rcl}
x & = & kt^a \\
\log_3
… Read $\begin{array}{rcl}
x & = & kt^a \\
\log_3
2012PP-II-38
Ans: C
Consider $y=a\sin(x^\circ+\theta)$.
… Read Consider $y=a\sin(x^\circ+\theta)$.
If $\theta$ i
2012PP-II-39
Ans: A
Note that $\angle DAB$ and $\angle CBA$ are $90^\circ
… Read Note that $\angle DAB$ and $\angle CBA$ are $90^\circ
2012PP-II-40
Ans: C
Let $AD=AF=r\mbox{ cm}$.
… Read Let $AD=AF=r\mbox{ cm}$.
Since $AD$ is a radius of the