2017-II-22
Ans: D
In $\Delta BCE$,
… Read In $\Delta BCE$,
$\begin{array}{rcl}
\cos 40^\circ
HKDSE-MATH - 2017
2017-II-23
Ans: A
I is true. Note that $m_{L_1} = \dfrac{-1}{m}$ and $m_
… Read I is true. Note that $m_{L_1} = \dfrac{-1}{m}$ and $m_
2017-II-24
Ans: A
Note that the slope of the straight line $9x-5y+45=0$
… Read Note that the slope of the straight line $9x-5y+45=0$
2017-II-25
Ans: C
Plot the points $P$, $Q$ and $R$ on the same polar coord
… Read Plot the points $P$, $Q$ and $R$ on the same polar coord
2017-II-26
Ans: A
I is true. Note that the centre of $C_1$ is
… Read I is true. Note that the centre of $C_1$ is
$\begin{arr
2017-II-27
Ans: B
Note that $A$ and $B$ are points lying on the circle. Th
… Read Note that $A$ and $B$ are points lying on the circle. Th
2017-II-28
Ans: C
The required probability
… Read The required probability
$\begin{array}{cl}
=
2017-II-29
Ans: B
The lower quartile of the distribution is the data of t
… Read The lower quartile of the distribution is the data of t
2017-II-30
Ans: B
Note that the mean of the positive integers is $5$, the
… Read Note that the mean of the positive integers is $5$, the
2017-II-31
Ans: D
Note that $g(x) = f\left(\dfrac{x}{2}\right)$ mean
… Read Note that $g(x) = f\left(\dfrac{x}{2}\right)$ mean
2017-II-32
Ans: D
$\begin{array}{cl}
& 8^3 + 8^{19} \\
= & (2
… Read $\begin{array}{cl}
& 8^3 + 8^{19} \\
= & (2
2017-II-33
Ans: C
By applying intercept form to the given figure, we hav
… Read By applying intercept form to the given figure, we hav
2017-II-34
Ans: D
$\left\{\begin{array}{ll}
\log_9 y = x – 3 �
… Read $\left\{\begin{array}{ll}
\log_9 y = x – 3 �
2017-II-35
Ans: B
$\begin{array}{rcl}
\dfrac{5}{2-i} + ki & = &#
… Read $\begin{array}{rcl}
\dfrac{5}{2-i} + ki & = &#
2017-II-36
Ans: C
I is not an arithmetic sequence.It is because $\pi^{4
… Read I is not an arithmetic sequence.It is because $\pi^{4
2017-II-37
Ans: C
Consider $\left\{ \begin{array}{ll} y = 9 & \ld
… Read Consider $\left\{ \begin{array}{ll} y = 9 & \ld
2017-II-38
Ans: A
Since $ABCD$ is a rectangle, $\angle ABC = \angle ADC =
… Read Since $ABCD$ is a rectangle, $\angle ABC = \angle ADC =
2017-II-39
Ans: A
Consider $\Delta ABD$. Since $AD$ is a vertical pole,
… Read Consider $\Delta ABD$. Since $AD$ is a vertical pole,
2017-II-40
Ans: B
Join $AC$.
… Read Join $AC$.
Since $DE$ is the tangent to the circle at $A
2017-II-41
Ans: D
Draw the graph according to the question.
… Read Draw the graph according to the question.
According t