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  1. A

    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Need help with part b
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Found T to be 4, now how do I find max theta. Do I sub t = 4 into displacements of x and y and differentiate parametrically. I tried and got -cos(x)/sin(x) x for theta Answer says 30 degrees
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread For part c) Do i differentiate this equation in part b) in respects to T ? If so how do you find the derivate of x(T) squared ??
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Not sure how to answer part b Do i get the cartisan form?
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    Polynomial Topic Questions

    The coefficients of the polynomials P(x) = ax^3 + bx + c are real and P(x) has a multiple zero at x = 1. When P(x) is divided by x + 1 the remainder is 4. Find the values of a, b, and c.
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    Polynomial Topic Questions

    Suppose that P(x) = x^3 + x^2 + 6x - 3 a) use the remainder theorem to find the remainder when P(x) is divided by x + 2i b)Hence find the remainder when p(x) is divided by: i) x - 2i , ii) x^2 + 4
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Yes, but the questions from the chapter about sums and products. So I think they want us to use that.
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread .
  11. A

    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread It's from the Grammar Trial 2015
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread So displacement can be either positive or negative? Whereas distance is positive or 0 only.
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread If v^2 = 24 - 6x -3x^2, find the acceleration of the particle at the particles greatest displacement from the origin. My answer: Greatest displacement at amplitude where v = 0 When v = 0 ( x - 2) (x + 4) = 0 so x = 2 or...
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Not sure how to show cot(3pi/10) = tan(pi/5)
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread I understand your mathematics, I just have a tough time trying to visualise the angle being formed.
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Unsure about part b) iii) Answer says 112 degrees I get the answer 90 degrees.
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread It worked out. Just unsure why there are two answers for the acceleration I just got the negative answer ( -3pi^2/8 ). Why is there also a positive answer? Also why is there only one answer for velocity (2pi). If you sub...
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Using n = pi/4 and a = 10 and x = 4 accel = -pi^2/4 velocity = +- piroot21/2 Answers says 2pi cm/s , +/- 3pi^2 / 8 cm/s^2 So I think its the x value that is wrong. But If O is the centre of AB ( ie at 10 cm) , then 6 cm...
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Stuck on part b) Answers says 2pi cm/s , +/- 3pi^2 / 8 cm/s^2
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread It all worked out. Just wondering if there is a shortcut for the auxiliary angle method. Going through that method took about half of the entire working of the question.
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Having difficulties with part b) Answer is: period: 2pi/3 , amplitude: 2root13, max speed 6root13, absolute acceleration = 9root13
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