# Core Mathematics C34

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1 Write your name here Surname Other names Pearson Edexcel International Advanced Level Centre Number Candidate Number Core Mathematics C34 Advanced Tuesday 21 June 2016 Morning Time: 2 hours 30 minutes You must have: Mathematical Formulae and Statistical Tables (Blue) Paper Reference WMA02/01 Total Marks P46714A 2016 Pearson Education Ltd. 1/1/1/1/1/1/ Candidates may use any calculator allowed by the regulations of the Joint Council for Qualifications. Calculators must not have the facility for symbolic algebra manipulation, differentiation and integration, or have retrievable mathematical formulae stored in them. Instructions Use black ink or ball-point pen. If pencil is used for diagrams/sketches/graphs it must be dark (HB or B). Coloured pencils and highlighter pens must not be used. Fill in the boxes at the top of this page with your name, centre number and candidate number. Answer all questions and ensure that your answers to parts of questions are clearly labelled. Answer the questions in the spaces provided there may be more space than you need. You should show sufficient working to make your methods clear. Answers without working may not gain full credit. When a calculator is used, the answer should be given to an appropriate degree of accuracy. Information The total mark for this paper is 125. The marks for each question are shown in brackets use this as a guide as to how much time to spend on each question. Advice Read each question carefully before you start to answer it. Try to answer every question. Check your answers if you have time at the end. *P46714A0152* Turn over

2 1. (a) Express 3cos +5sin in the form Rcos( ), where R and are constants, R and Give the exact value of R and give the value of to 2 decimal places. (3) (b) Hence solve, for 0 360, the equation 3cos +5sin = 2 Give your answers to one decimal place. (c) Use your solutions to parts (a) and (b) to deduce the smallest positive value of for which 3cos 5sin = 2 (4) (2) 2 *P46714A0252*

3 Question 1 continued *P46714A0352* 3 Turn over

4 Question 1 continued 4 *P46714A0452*

5 Question 1 continued (Total 9 marks) Q1 *P46714A0552* 5 Turn over

6 π 2. The point P with coordinates,1 lies on the curve with equation 2 2 π 5π 4xsin x = πy + 2 x, x 6 6 Find an equation of the normal to the curve at P. (6) 6 *P46714A0652*

7 Question 2 continued (Total 6 marks) Q2 *P46714A0752* 7 Turn over

8 3. (a) Find the binomial expansion of (1 + ax) 3, ax 1 in ascending powers of x, up to and including the term in x 3, giving each coefficient as simply as possible in terms of the constant a. (3) f( x 2 + 3x ) = ( 1 + ax), ax 1 3 In the series expansion of f(x), the coefficient of x 2 is 3 Given that 0 (b) find the value of the constant a, (c) find the coefficient of x 3 in the series expansion of f(x), giving your answer as a simplified fraction. (2) (4) 8 *P46714A0852*

9 Question 3 continued *P46714A0952* 9 Turn over

10 Question 3 continued 10 *P46714A01052*

11 Question 3 continued (Total 9 marks) Q3 *P46714A01152* 11 Turn over

12 4 3 2 x + x 7x + 8x g( x) =, 2 x + x 12 (a) Given that x > 3, x x + x 7x + 8x 48 2 B x + A + 2 x + x 12 x 3 find the values of the constants A and B. (b) Hence, or otherwise, find the equation of the tangent to the curve with equation y = g(x) at the point where x = 4. Give your answer in the form y = mx + c, where and c are constants to be determined. (5) (4) 12 *P46714A01252*

13 Question 4 continued *P46714A01352* 13 Turn over

14 Question 4 continued 14 *P46714A01452*

15 Question 4 continued (Total 9 marks) Q4 *P46714A01552* 15 Turn over

16 5. Use integration by parts to find the exact value of 0 2 x2 Write your answer as a single simplified fraction. (6) x dx 16 *P46714A01652*

17 Question 5 continued *P46714A01752* 17 Turn over

18 Question 5 continued 18 *P46714A01852*

19 Question 5 continued (Total 6 marks) Q5 *P46714A01952* 19 Turn over

20 6. Given that and are constants and that a b 0 (a) on separate diagrams, sketch the graph with equation (i) y = x a (ii) y = x a b Show on each sketch the coordinates of each point at which the graph crosses or meets the x-axis and the y-axis. (5) (b) Hence or otherwise find the complete set of values of x for which x a b 1 x 2 giving your answer in terms of a and b. (4) 20 *P46714A02052*

21 Question 6 continued *P46714A02152* 21 Turn over

22 Question 6 continued 22 *P46714A02252*

23 Question 6 continued (Total 9 marks) Q6 *P46714A02352* 23 Turn over

24 7. y O Figure 1 R 2 5 x Diagram not drawn to scale 1 Figure 1 shows a sketch of part of the curve with equation y =, x 25. 2x + 5 The finite region R, shown shaded in Figure 1, is bounded by the curve, the x-axis and the lines with equations x = 2 and x = 5 (a) Use the trapezium rule with three strips of equal width to find an estimate for the area of R, giving your answer to 3 decimal places. (4) (b) Use calculus to find the exact area of R. (c) Hence calculate the magnitude of the error of the estimate found in part (a), giving your answer to one significant figure. (1) (4) 24 *P46714A02452*

25 Question 7 continued *P46714A02552* 25 Turn over

26 Question 7 continued 26 *P46714A02652*

27 Question 7 continued (Total 9 marks) Q7 *P46714A02752* 27 Turn over

28 8. (a) Prove that (b) Hence solve, for 0 (2n + 1) π sin 2x tan x tan xcos 2 x, x, n Z 2 π θ < 2 (i) sin 2θ tan θ = 3 cos 2θ (ii) tan( θ + 1)cos(2θ + 2) sin(2θ + 2) = 2 Give your answers in radians to 3 significant figures, as appropriate. (.) (4) (7) 28 *P46714A02852*

29 Question 8 continued *P46714A02952* 29 Turn over

30 Question 8 continued 30 *P46714A03052*

31 Question 8 continued (Total 11 marks) Q8 *P46714A03152* 31 Turn over

32 9. P O Figure 2 The population of a species of animal is being studied. The population P, at time t years from the start of the study, is assumed to be where k is a positive constant. P = kt 9000e, t 0 kt 3e + 7 A sketch of the graph of P against t is shown in Figure 2. Use the given equation to (a) find the population at the start of the study, (b) find the value for the upper limit of the population. Given that P = 2500 when t = 4 (c) calculate the value of k, giving your answer to 3 decimal places. Using this value for k, (d) find, using d P, the rate at which the population is increasing when t = 10 dt Give your answer to the nearest integer. t (2) (1) (5) (3) 32 *P46714A03252*

33 Question 9 continued *P46714A03352* 33 Turn over

34 Question 9 continued 34 *P46714A03452*

35 Question 9 continued (Total 11 marks) Q9 *P46714A03552* 35 Turn over

36 π π 10. (a) Given that < g( x) <, sketch the graph of y = g(x) where 2 2 g(x) = arctan x, (b) Find the exact value of x for which 3g(x + 1) = 0 x 1 The equation arctan x 4 + x = 0 has a positive root at x = radians. 2 (c) Show that 5 6 The iteration formula x n + 1 = 8 2 arctan x n can be used to find an approximation for (d) Taking x 0 = 5, use this formula to find x 1 and x 2, giving each answer to 3 decimal places. (2) (2) (3) (2) 36 *P46714A03652*

37 Question 10 continued *P46714A03752* 37 Turn over

38 Question 10 continued 38 *P46714A03852*

39 Question 10 continued (Total 9 marks) Q10 *P46714A03952* 39 Turn over

40 11. With respect to a fixed origin O, the lines l 1 and l 2 are given by the equations l l : r = 4 + λ : r = 7 + μ 4 3 b where and are scalar parameters and b is a constant. Given that l 1 and l 2 meet at the point X, (a) show that b = 3 and find the coordinates of X. The point A lies on l 1 and has coordinates (6, 3, 5) The point B lies on l 2 and has coordinates (14, 9, 9) (b) Show that angle AXB = 1 arccos 10 (c) Using the result obtained in part (b), find the exact area of triangle AXB. Write your answer in the form p q where and are integers to be determined. (3) (5) (4) 40 *P46714A04052*

41 Question 11 continued *P46714A04152* 41 Turn over

42 Question 11 continued 42 *P46714A04252*

43 Question 11 continued (Total 12 marks) *P46714A04352* Q11 43 Turn over

44 12. y O S 3 2 Figure 3 Figure 3 shows a sketch of the curve with parametric equations x = 3sin t, y = 2sin2 t, 0 t The finite region S, shown shaded in Figure 3, is bounded by the curve, the x-axis and the line with equation x = 3 2 The shaded region S is rotated through 2 radians about the x-axis to form a solid of revolution. (a) Show that the volume of the solid of revolution is given by a 2 3 k sin tcos t dt where k and a are constants to be given in terms of 0 (b) Use the substitution u = sin t, or otherwise, to find the exact value of this volume, giving your answer in the form pπ where and are integers. q (.) (6) π 2 x (5) 44 *P46714A04452*

45 Question 12 continued *P46714A04552* 45 Turn over

46 Question 12 continued 46 *P46714A04652*

47 Question 12 continued (Total 11 marks) Q12 *P46714A04752* 47 Turn over

48 13. Figure 4 Figure 4 shows a hemispherical bowl containing some water. At t seconds, the height of the water is cm and the volume of the water is V cm 3, where 1 = (30 ), 0 < V πh h h The water is leaking from a hole in the bottom of the bowl. Given that d V dt (a) show that d h dt (b) Write = 1 V 10 30( 20 ) ( 30 ) h( 30 h) = 30( 20 h) Given that = 10 when t = 0, in partial fraction form. (c) use your answers to parts (a) and (b) to find the time taken for the height of the water to fall to 5 cm. Give your answer in seconds to 2 decimal places. (6) (5) (3) 48 *P46714A04852*

49 Question 13 continued *P46714A04952* 49 Turn over

50 Question 13 continued 50 *P46714A05052*

51 Question 13 continued *P46714A05152* 51 Turn over

52 Question 13 continued (Total 14 marks) TOTAL FOR PAPER: 125 MARKS END Q13 52 *P46714A05252*

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