1. Town A is 48 km from town B and 32 km from town C as shown in the diagram. A 48km
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1 1. Town is 48 km from town and 32 km from town as shown in the diagram. 32km 48km Given that town is 56 km from town, find the size of angle (Total 4 marks) Â to the nearest degree. 2. The diagram shows a vertical pole Q, which is supported by two wires fixed to the horizontal ground at and. Find the height of the pole, Q; Q = 40 m ˆ Q = 36 ÂQ = 70 ˆ Q = 30 the distance between and. (Total 4 marks) Q The following diagram shows the triangle O, where O = 2 cm, = 4 cm and O = 3 cm. alculate Ô, giving your answer in radians. diagram not to scale The following diagram shows two circles which intersect at the points and. The smaller circle 1 has centre O and radius 3 cm, the larger circle 2 has centre and radius 4 cm, and O = 2 cm. The point D lies on the circumference of 1 and E on the circumference of 2.Triangle O is the same as triangle O in the diagram above. O 2 1 D E O diagram not to scale Find Ô, giving your answer in radians. I Questionbank Maths SL 1
2 Given that ˆ is 1.63 radians, calculate the area of (i) sector E; sector OD. The area of the quadrilateral O is 5.81 cm 2. (i) Find the area of OE. Hence find the area of the shaded region ED. (Total 14 marks) 4. The diagrams below show two triangles both satisfying the conditions = 20 cm, = 17 cm, ˆ = 50. Diagrams not to scale Triangle 1 Triangle 2 alculate the size of Ĉ in Triangle 2. alculate the area of Triangle 1. (Total 4 marks) 5. The following diagram shows a triangle with sides 5 cm, 7 cm, 8 cm. Find the size of the smallest angle, in degrees; the area of the triangle. (Total 4 marks) The points, Q, R are three markers on level ground, joined by straight paths Q, QR, R as shown in the diagram. QR = 9 km, Qˆ R = 35, Rˆ Q = 25. Q km R Diagram not to scale Find the length R. I Questionbank Maths SL 2
3 Tom sets out to walk from Q to at a steady speed of 8 km h 1. t the same time, lan sets out to jog from R to at a steady speed of a km h 1. They reach at the same time. alculate the value of a. The point S is on [Q], such that RS = 2QS, as shown in the diagram. S Q R Find the length QS. (6) (Total 16 marks) 7. Let y = 16x x 256. Given that y has a maximum value, find (i) the value of x giving the maximum value of y; this maximum value of y. The triangle XYZ has XZ = 6, YZ = x, XY = z as shown below. The perimeter of triangle XYZ is 16. (i) Express z in terms of x. Using the cosine rule, express z 2 in terms of x and cos Z. (iii) Hence, show that cos Z = 5x 16. 3x Let the area of triangle XYZ be. Show that 2 = 9x 2 sin 2 Z. Hence, show that 2 = 16x x 256. (e) (i) Hence, write down the maximum area for triangle XYZ. What type of triangle is the triangle with maximum area? (Total 20 marks) 8. The following diagram shows two semi-circles. The larger one has centre O and radius 4 cm. The smaller one has centre, radius 3 cm, and passes through O. The line (O) meets the larger semi-circle at S. The semi-circles intersect at Q. (i) Explain why OQ is an isosceles triangle. I Questionbank Maths SL 3
4 1 Use the cosine rule to show that cos O ˆ Q =. 9 (iii) Hence show that sin O ˆ Q = (iv) Find the area of the triangle OQ. onsider the smaller semi-circle, with centre. (i) Write down the size of O ˆ Q. alculate the area of the sector OQ. onsider the larger semi-circle, with centre O. alculate the area of the sector QOS. Hence calculate the area of the shaded region. (Total 17 marks) 9. The following diagram shows a pentagon DE, with = 9.2 cm, = 3.2 cm, D = 7.1 cm, ÊD =110, Dˆ E = 52 and ˆ D = 60. Find D. Find DE. The area of triangle D is 5.68 cm 2. Find D ˆ. (e) Find. Find the area of quadrilateral D. (Total 21 marks) 10. ship leaves port on a bearing of 030. It sails a distance of 25 km to point. t, the ship changes direction to a bearing of 100. It sails a distance of 40 km to reach point. This information is shown in the diagram below. diagram not to scale I Questionbank Maths SL 4
5 second ship leaves port and sails directly to. Find the distance the second ship will travel. Find the bearing of the course taken by the second ship. (Total 7 marks) 11. farmer owns a triangular field. One side of the triangle, [], is 104 m, a second side, [], is 65 m and the angle between these two sides is 60. Use the cosine rule to calculate the length of the third side of the field. Given that sin 60 = integer. 3, find the area of the field in the form 3p 3 where p is an 2 Let D be a point on [] such that [D] bisects the 60 angle. The farmer divides the field into two parts 1 and 2 by constructing a straight fence [D] of length x metres, as shown on the diagram below. (i) Show that the area of 1 is given by 65x. 4 Find a similar expression for the area of 2. (iii) Hence, find the value of x in the form q 3, where q is an integer. (i) Explain why sindˆ sindˆ. Use the result of part (i) and the sine rule to show that D 5. D 8 (Total 18 marks) 12. The diagram below shows triangle QR. The length of [Q] is 7 cm, the length of [R] is 10 cm, and Qˆ R is 75. I Questionbank Maths SL 5
6 Find Qˆ R. Find the area of triangle QR. (Total 6 marks) 13. The diagram below shows a quadrilateral D. = 4, D = 8, D =12, Ĉ D = 25, ÂD =. Use the cosine rule to show that D = 4 5 4cos. Let = 40. (i) Find the value of sin ˆ D. Find the two possible values for the size of ˆ D. (iii) Given that ˆ D is an acute angle, find the perimeter of D. Find the area of triangle D. (12) (Total 16 marks) 14. The following diagram shows a semicircle centre O, diameter [], with radius 2. Let be a point on the circumference, with Ô = radians. Find the area of the triangle O, in terms of. Explain why the area of triangle O is the same as the area triangle O. Let S be the total area of the two segments shaded in the diagram above. I Questionbank Maths SL 6
7 Show that S = 2( 2 sin ). (e) Find the value of when S is a local minimum, justifying that it is a minimum. Find a value of for which S has its greatest value. (8) (Total 18 marks) 15. The diagram below shows a circle with centre O and radius 8 cm. The points,,, D, E and F are on the circle, and [F] is a diameter. The length of arc is 6 cm. Find the size of angle O. Hence find the area of the shaded region. (6) The area of sector ODE is 45 cm 2. Find the size of angle OE. Find EF. (Total 15 marks) 16. The diagram below shows a triangle D with = 13 cm and D = 6.5 cm. Let be a point on the line D such that = = 7 cm. Find the size of angle. Find the size of angle D. (Total 8 marks) I Questionbank Maths SL 7
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