NATIONAL SENIOR CERTIFICATE GRADE 11

Transcription

1 NATIONAL SENIOR CERTIFICATE GRADE MATHEMATICS P NOVEMBER 06 MARKS: 50 TIME: 3 hours This question paper consists of 3 pages and a -page answer book.

2 Mathematics/P DBE/November 06 INSTRUCTIONS AND INFORMATION Read the following instructions carefully before answering the questions This question paper consists of questions. Answer ALL the questions in the SPECIAL ANSWER BOOK provided. Clearly show ALL calculations, diagrams, graphs et cetera that you used to determine the answers. Answers only will NOT necessarily be awarded full marks. If necessary, round off answers to TWO decimal places, unless stated otherwise. Diagrams are NOT necessarily drawn to scale. You may use an approved scientific calculator (non-programmable and non-graphical), unless stated otherwise. Write neatly and legibly.

3 Mathematics/P 3 DBE/November 06 QUESTION The table below shows the number of cans of food collected by 9 classes during a charity drive Calculate the range of the data. (). Calculate the standard deviation of the data. ().3 Determine the median of the data. ().4 Determine the interquartile range of the data. (3).5 Use the number line provided in the ANSWER BOOK to draw a box and whisker diagram for the data above. (3).6 Describe the skewness of the data. ().7 Identify outliers, if any exist, for the above data. () [] QUESTION The table below shows the time (in minutes) that 00 learners spent on their cellphones during a school day. TIME SPENT (IN MINUTES) FREQUENCY 95 < x < x < x < x < x < x < x < x Complete the cumulative frequency column in the table provided in the ANSWER BOOK. (). Draw a cumulative frequency graph (ogive) of the data on the grid provided. (3).3 Use the cumulative frequency graph to determine the value of the lower quartile. ().4 Determine, from the cumulative frequency graph, the number of learners who used their cellphones for more than 40 minutes. () [9]

4 Mathematics/P 4 DBE/November 06 QUESTION 3 In the diagram, A(6 ; ), B( ; 5) and C( 4 ; 3) are the vertices of ABC. M is the midpoint of AB. N is a point on CA such that MN BC. y B( ; 5) // < M C( 4 ; 3) < // O N A(6 ; ) x 3. Determine the coordinates of M, the midpoint of AB. () 3. Determine the gradient of line MN. (3) 3.3 Hence, or otherwise, determine the equation of line MN, in the form y mx c. () 3.4 Calculate, with reasons, the coordinates of point N. (4) 3.5 If ABCD (in that order) is a parallelogram, determine the coordinates of point D. (4) [5]

5 Mathematics/P 5 DBE/November 06 QUESTION 4 In the diagram, R and A are the x- and y-intercepts respectively of the straight line AR. The equation of AR is y x 4. Another straight line cuts the y-axis at P(0 ; ) and passes through the points M(k ; 0) and N(3 ; 4). and are the angles of inclination of the lines MN and AR respectively. y A N(3 ; 4) M(k ; 0) < O P(0 ; ) < R x 4. Given that M, P and N are collinear points, calculate the value of k. (3) 4. Determine the size of θ, the obtuse angle between the two lines. (4) 4.3 Calculate the length of MR. (3) 4.4 Calculate the area of MNR. (3) [3]

6 Mathematics/P 6 DBE/November 06 QUESTION 5 5. In the diagram below, P( 8 ; t) is a point in the Cartesian plane such that OP = 7 units and reflex X ÔP. y O x 7 P( 8 ; t ) 5.. Calculate the value of t. () 5.. Determine the value of each of the following WITHOUT using a calculator: (a) cos( ) () (b) sin () 5. If sin 7 a, WITHOUT using a calculator, express the following in terms of a : 5.. tan 7 (3) 5.. sin 07 () 5..3 cos 53 sin 557 (4) 5.3 Simplify fully, WITHOUT the use of a calculator: cos( 5 ).sin35 sin 330 tan 5 (6) 5.4 Prove the identity: (cos x )(cos x ) tan x. cos x (4) 5.5 Determine the general solution for sin x.cos x cos x. (6) [3]

7 Mathematics/P 7 DBE/November 06 QUESTION 6 In the diagram the graphs of the interval 80 x 90. f ( x) cos x and g( x) sin( x b) y are drawn for.5 f 0.5 x g Write down the value of b. () 6. Write down the period of g. () 6.3 Write down the value(s) of x in the interval 80 x 90 for which f ( x) g( x) 0. () 6.4 For which values of x in the interval 80 x 90 is sin( 90 x) g( x)? (3) 6.5 The graph of h is obtained by shifting f 3 units upwards. Determine the range of h. () [9]

8 Mathematics/P 8 DBE/November 06 QUESTION 7 7. In the figure below, acute-angled ABC is drawn having C at the origin. B C A 7.. Prove that c a b abcos C. (6) 7.. Hence, deduce that ( a b c)( a b c) cos C ab (4) 7. Quadrilateral ABCD is drawn with BC 35 m and AB 90,5 m. given that A Dˆ B 3,3 ; D ÂB 09,6 and C BD ˆ 48,88. It is also A 09,6 90,5 m D 3,3 48,88 B 35 m Determine the length of: C BD CD (3) (3) [6]

9 Mathematics/P 9 DBE/November 06 QUESTION 8 The diagram below shows a water tank which is made up of a cylinder and cone having equal radii. The height of the tank is,8 m and the radius is 0,5 m. The angle between the perpendicular height, AB, and the slant height, AC, of the conical section is 35,5. Volume of cone = A 35,5 Total surface area of cone = Volume of cylinder = Total surface area of cylinder = B 0,5 m C,8 m 8. Calculate the perpendicular height, AB, of the cone. () 8. When the tank is full, an electric pump switches on and pumps the water from the tank into an irrigation system at a rate of 0,5 m /h. The pump automatically switches off when the tank is full. 4 Calculate how long, in hours, the pump feeds water into the irrigation system. (4) [6]

10 Mathematics/P 0 DBE/November 06 Give reasons for your statements and calculations in QUESTIONS 9, 0, and. QUESTION 9 9. Complete the statement so that it is TRUE: The angle subtended by an arc at the centre of a circle is... () 9. O is the centre of circle TNSPR. P ÔS 60 and PS = NT. T N R O 60 P S Calculate the size of: 9.. P Rˆ S () 9.. N ŜT () [6]

11 Mathematics/P DBE/November 06 QUESTION 0 D, E, F, G and H are points on the circumference of the circle. Ĝ x 0 and Ĥ x 0. DE FG. E F x + 0 G D x + 0 H 0. Determine the size of D ÊG in terms of x. () 0. Calculate the size of Dˆ HG. (4) [6]

12 Mathematics/P DBE/November 06 QUESTION O is the centre of the circle PTR. N is a point on chord RP such that ON PR. RS and PS are tangents to the circle at R and P respectively. RS = 5 units; TS = 9 units; R PS ˆ 4,83. P 4,83 O N T 9 S R 5. Calculate the size of N ÔR. (5). Calculate the length of the radius of the circle. (4) [9]

13 Mathematics/P 3 DBE/November 06 QUESTION. Use the diagram below to prove the theorem which states that EFˆG EDˆ F. D E F G (5). In the diagram below, BOC is a diameter of the circle. AP is a tangent to the circle at A and AE = EC. A D P 3 3 E C 3 O B Prove that:.. BA OD (4).. AOCD is a cyclic quadrilateral (5)..3 DC is a tangent to the circle at C (4) [8] TOTAL: 50