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Timothy Gan

This is Tim. Tim loves to teach math. Tim seeks to improve his teaching incessantly! Help Tim by telling him how he can do better.

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2009 NJC P1 Q7

2009 NJC P1 Q7 In a triangle $ABC$, $AB=3$ cm and $AC=2$ cm. If angle $BAC$ is increasing at a constant rate of $0.1$ radians per second, find the rate

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SAJC Functions Tutorial Q11

SAJC Functions Tutorial Q11 The functions $text{f}$ and $text{g}$ are defined as follows $text{f}:xmapsto sin x$, $xin mathbb{R}$, $-pi le xle 2pi $.$text{g}:xmapsto cos x$, $xin mathbb{R}$, $0le xle 2pi

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ASRJC Binomial Distribution Tutorial Q12

ASRJC Binomial Distribution Tutorial Q12 A biscuit factory produces biscuits which are packed into its signature gift boxes. On average, $3%$ of these gift boxes packed are substandard. (i) Show

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2006 MJC Promo

2006 MJC Promo The function $text{f}$ is defined by $text{f}:xmapsto ln left( {{x}^{2}}-x-2 right)$, $c<x<d$, where $c<d<0$. (a) Find the values of $c$ and $d$ such that the range of

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2022 HCI J1 BT Q1

2022 HCI J1 BT Q1 A piecewise function is given as $text{f}left( x right)=left{ begin{matrix}3-xtext{ for }1le xle 3, \sqrt{4-{{left( x-5 right)}^{2}}}text{ for }3<xle 5 \end{matrix} right.$ And that $text{f}left(

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2010 ACJC CT2

2010 ACJC CT2 (a) Given the functions $text{f}:xmapsto 3{{x}^{3}}-4{{x}^{2}}-1$, $xge 1$,$text{g}:xmapsto {{text{e}}^{2-0.25{{x}^{2}}}}$, $xge -3$. (i) Explain why the functions ${{text{f}}^{-1}}$ and $text{gf}$ exist, [2] (ii) Find the exact value of

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2018 PJC BT2 P2 Q8

2018 PJC BT2 P2 Q8 Tomatoes are sold in boxes of $16$. On average, $15%$ of them are damaged. (i) State, in context, two assumptions needed for the number of

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2022 TJC Promo Q12

2022 TJC Promo Q12 As part of a structure for a marble race, a plane $p$ is placed at an angle $theta $ to the horizontal ground. The ground is

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2017 ACJC P2 Q6

2017 ACJC P2 Q6 Alex and his friend stand randomly in a queue with $3$ other people. The random variable $X$ is the number of people standing between Alex and

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2020 YIJC P2 Q8

2020 YIJC P2 Q8 A manufacturing company produces surgical masks. The surgical masks are randomly packed into boxes of $50$. On average, $15%$ of the surgical masks are defective. The

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