Trigonometric Ratios (Edexcel IGCSE Further Pure Maths): Exam Questions

Exam code: 4PM1

52 mins7 questions
1a
3 marks
Diagram of a pyramid with triangular base ABC and apex O. Sides OA and OC are 12 cm, AB and AC are 8 cm, and height OD is labelled. Diagram not to scale.

Figure 2 shows a right pyramid A B C D O spacewith a horizontal square base of side 8 cm. The vertical height of the pyramid is h cm and O A space equals space O B space equals space O C space equals space O D space equals space 12 cm.

Find the exact value of h.

1b
2 marks

Find, to 1 decimal place, the size of the angle between O A and the plane A B C D.

1c
2 marks

Find, to 1 decimal place, the size of the angle between the plane A O B and the plane A B C D.

1d
4 marks

The midpoint of O A spaceis P and Q is the point on B C such that B Q space colon space Q C space equals space 3 space colon 1

Show that P Q space equals space 4 square root of space 5 end root cm.

2a
3 marks
Irregular hexagon with vertices A, B, C, D, E, F, and internal angles 60° and 45°. Diagram indicates "not accurately drawn." Side AB is 24 cm.

Figure 5 shows a right triangular prism A B C D E F spacewhere A B C D is a rectangle.

A F space equals space D E     B F space equals space C E     A D space equals space F E space equals space B C     A B space equals space D C space equals space 24 cm

angle A B F space equals space angle D C E space equals space 45 degree     angle B A F space equals space angle C D E space equals 60 degree

The angle between the plane A E B spaceand the plane A B C D spaceis space 65 degree

Find, in cm to 2 significant figures, the length of E F

2b
4 marks

Find, in degrees to one decimal place, the size of the angle between the line space C F spaceand the plane A B C D

3
6 marks
3D trapezoidal prism diagram with labelled vertices A-F, marked 20 cm and 15 cm edges, a 40° angle at vertex C. Note: Diagram not accurately drawn.

Figure 1 shows a right prism A B C D E F space
Triangle C D E spaceis a cross section of the prism.

  • space angle D C E space equals space angle A B F space equals space 90 degree

  • angle E D C space equals space angle F A B space equals space 40 degree

  • D E space equals space A F space equals space 15 cm

  • E F space equals space D A space equals space C B space equals space 20 cm

Find, in degrees to one decimal place, the size of the angle between the line F D spaceand the plane D C B A

4
6 marks
Pentagonal pyramid diagram with apex V, base vertices A, B, C, D, and E; sides VB and VD marked 3x cm, base AB and AD marked 2x cm; not to scale.

Figure 4 shows a right pyramid with vertex V and base A B C D Ewhich is a regular pentagon.

A B equals B C equals C D equals D E equals E A equals 2 x space cm
V A equals V B equals V C equals V D equals V E equals 3 x space cm

Find, in degrees to one decimal place, the size of the angle between the plane V B C and the base A B C D E

5a
3 marks
Geometric diagram with triangle VDC above quadrilateral ABCD, lines intersect at O, marked x cm. Diagram not accurately drawn. Labelled as Figure 3.

Figure 3 shows a right pyramid with a horizontal square base.

A B equals B C equals C D equals D A equals space x space cm
A V italic equals B V italic equals C V italic equals D V italic equals italic space x italic space cm

O is the point of intersection of the diagonals of the base.
The vertex V of the pyramid is vertically above O

Show that V O equals fraction numerator square root of 2 over denominator 2 end fraction space x space cm

5b
2 marks

Find, in degrees, the size of the angle A V C

5c
3 marks

Find, in degrees to one decimal place, the size of the angle between the plane V A B and the plane V A D

5d
3 marks

The volume of the pyramid is 200 cm3

Given that the volume space of space straight a space pyramid equals 1 third cross times base space area cross times height

Find to 3 signficant figures, the value of x

6
4 marks

The point A has coordinates (–5, 3), the point B has coordinates (4, 0) and the point C has coordinates (–1, 5).

The line l passes through C and is perpendicular to A B.

Find the value of tan space angle A B C.
Give your answer in its simplest form.

7a
3 marks
A geometric diagram shows a pyramid with a square base ABCD, top vertex E, and lines EA, EB, EC, ED. Notes state it is not accurately drawn.

Figure 2 shows a right pyramid with a square base A B C D and vertex E.

The base of the pyramid is horizontal with A B equals B C equals 12 space cm.
The diagonals of the base intersect at the point O.

The vertex E of the pyramid is vertically above O and the angle between E Aand the plane A B C D is 30°

The height of the pyramid is h cm.

Find the exact value of h

7b
4 marks

The point F lies on A D such that A F space colon space F D equals 1.4

Calculate, to the nearest degree, the size of the angle E F O.