HKDSE-MATH - 2012PP - Paper 2 -

Ans: D
Add a rectangle on the figure as shown below.

Since the

Ans: A
For some positive constant $k$,

$\begin{array}{rcl

Ans: B
I must be true.

$\begin{array}{rcl}
\text{LHS} 

Ans: A
In $\Delta ABC$, we have

$\begin{array}{rcl}
\tan \t

Ans: A
$\begin{array}{cl}
& (\cos(90^\circ+\theta

Ans: D
$\begin{array}{rcl}
7\sin^2 x & = & \sin x

Ans: A
Consider $\Delta ABC$, we have

$\begin{array}{rcl}

Ans: C
$\begin{array}{cl}
& \dfrac{\cos 180^\circ}

Ans: B
$\begin{array}{rcl}
\cos^2 x – \sin x & =

Ans: B

Add points $E$ and $F$ on $AD$ and $CD$ respectively, s

Ans: B
$\begin{array}{rcl}
5 \sin^2 \theta + \sin \theta &#

Ans: D
In $\Delta BCE$,

$\begin{array}{rcl}
\cos 40^\circ

Ans: A
Since $ABCD$ is a rectangle, $\angle ABC = \angle ADC =

Ans: C
I may not be true. There is no enough information to pro

Ans: B
$\begin{array}{rcl}
6\cos^2 x & = & \cos x

Ans: B
Since $ABCD$ is a rectangle, then $AB = CD$ (property o

Ans: A
In $\Delta ACO$,

$\begin{array}{rcll}
OA & = &#

Ans: C
In $\Delta BCE$,

$\begin{array}{cl}
& BE^2 + BC