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Form 4 Mathematics Paper 2 End of Term 2 Exams 2021
Class: Form 4
Subject: Mathematics
Level: High School
Exam Category: Form 4 End Term 2 Exams
Document Type: Pdf
Views: 1628
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Exam Summary
MATHEMATICS
PAPER 2 121/2
TIME: 2HRS
END-TERM 2 FORM 4
SECTION A (50 Marks)
Attempt all questions in the spaces provided
1. Given that log a = -1.3748 and log b = - 1.5934, evaluate log #sqrt(a/b)#. (3 marks)
2. Make x the subject of the formula. #P= (x^(1/2)y)/(x^(1/2)-y# (3 marks)
3. Use reciprocal, square and cube root tables to evaluate to 4 significant figures, the expression. #root3(9/0.03746+0.6042^2# (3 marks)
4. A point P undergoes transformation represented by the matrix 
. Find the coordinate of the image of P. (2 marks)
5. Using a ruler and pair of compasses only. Construct an equilateral triangle ABC of sides 4cm construct the locus of a point P such that P is always on the same side of BC as A and #angleBPC#=30°. Shade the region where Q can be found if Q is outside the triangle and angle #angleBQC# > 30°. (3 marks)
6. A right circular cylinder is to be made so that the sum of its radius and its height is 6cm. Find the maximum possible volume of the cylinder. (3 marks)
7. The radius of a circle is measured to the nearest meter as 7m. Calculate the percentage error in the circumference. Leave your answer as a mixed number and take . #Take pi = 22/7 # (3 marks)
8. The first, the fifth and eleventh terms of an increasing arithmetic progression are three consecutive terms of a geometrical progression. If the first term of the arithmetic progression is 6. Find the common difference of the arithmetic progression (3 marks)
9. Wanjiku pays for a car on hire purchase in 15 monthly instalments. The cash price of the car is Ksh. 300,000 and the interest rate is 15% p.a. A deposit of Ksh 75,000 is made. Calculate her monthly repayments. (4 marks)
10. Factorize completely #6(x-4)^2-54# (3 marks)
11. Without using tables, rationalize the denominator in
#(2 tan 45°-tan 60°)/(4tan45° Sin30°-sqrt3 # (3 marks)
12. (a) Write the expansion of #(2- 1/5x)^5 # (1 mark)
(b) Hence use the expansion to find the value of #(1.96)^5# correct to 3 decimal places (3 marks)
13. Solve the equation 3Sin (2x-50°)= -1.5 if 0° < x < 360° (3 marks)
14. Two teachers are chosen at random from a staff of three women and 2 men to attend a seminar. Calculate the probability that the two teachers chosen are
(a) Of the same gender (2 marks)
(b) Of opposite gender (2 marks)
15. Simplify 
(3 marks)
16. In the figure below AB and CD are chords of a circle that intersect externally at Q. if AB=5cm, BQ=6cm and DQ=4cm, calculate the length of chord CD (3 marks)
SECTION B (50 MARKS)
ATTEMP ANY FIVE QUESTIONS IN THIS SECTION
17. The roof of a ware house is in the shape of a triangular prism as shown below
Calculate
(a) The angle between faces RSTU and PQRS (3 marks)
(b) The space occupied by the roof (3 marks)
(c) The angle between the plane QTR and PQRS (4 marks)
18. a) Complete the table below for y=sin 2x and y=sin ( 2x + 30) giving values to 2d.p
(2 marks)
b) Draw the graphs of y=sin 2x and y = sin (2x + 30) on the axis. (4 marks)
c) Use the graph to solve (1 mark)
d) Determine the transformation which maps (1 mark)
e) State the period amplitude of (2 marks)
19. A particle starts from rest at a point A and moves along a straight line coming to rest at another point B. During the motion, its velocity v(m/s) after time t (sec) is given by #v=9t^2 -2t^3#. Calculate:
a) the time taken for the particle to reach B. (2 marks)
b) the distance traveled during the first two seconds. (3 marks)
c) the time taken for the particle to attain its maximum velocity. (3 marks)
d) the maximum velocity attained (2 marks)
20. P and Q are two points on latitude 60°S. Their longitudes are 30°E and 90°W respectively.
Find:
(a) The distance between P and Q along the parallel of latitude (Take #pi=22/7# radius of earth = 6370 km and ) [to 1 decimal place.] (2 marks)
(b) The shortest distance along the earth’s surface between P and Q [to 1 decimal place]. (3 marks)
(c) A weather forecasters reports that the center of a cyclone at (300 S, 1200 W) is moving due south at 24 knots. How long will it take to reach a point (45° S, 120° W)? (3 marks)
(d) If it is 1400 hrs at Q, What will be the time at P? (2 marks)
21. The 2nd and 5th terms of an arithmetic progression are 8 and 17 respectively. The 2nd, 10th and 42nd terms of the A.P. form the first three terms of a geometric progression. Find:
(a) The 1st term and the common difference. (3 marks)
b) The first three terms of the G.P and the 10th term of the G.P. (4 marks)
(c)The sum of the first 10 terms of the G.P. (3marks)
22. The figure below shows a pulley with wheels center M and N, with a rubber belt ABCDEFA stretched round the wheels. The diameters of the wheel are 24cm and 8cm and the centers are 20 cm apart. Point p divides MN in the ratio 3:1
Find the area of the shaded region (10 marks)
23. Given that P varies jointly as Q and R. Given that Q=12, R=27 when P=18 calculate;
(a) The value of P when Q=9 and R=30 (3 marks)
(b) The value of R when P=60 and Q=30 (3 marks)
(c) The percentage by which P is changed when Q is decreased by 12% and R increased by 12% (4 marks)
24. The following table shows the distribution of marks obtained by 50 students.
By using an assumed mean of 62, calculate
a) the mean (5 marks)
b) the variance (3 marks)
c) the standard deviation (2 marks) `
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