MENU
Educational Resources
Exam Papers
Form 1 Videos
Form 2 Videos
Form 3 Videos
Form 4 Videos
Grade 4 Videos
Grade 5 Videos
Grade 6 Videos
Grade 7 Videos
Class 8 Videos
Form 1 Exams
Form 2 Exams
Form 3 Exams
Form 4 Exams
KCSE Videos
Class 8 Exams
Grade 5 Exams
Grade 4 Exams
Grade 3 Exams
Grade 2 Exams
Grade 1 Exams
Online Tests
Online Tuition
Sign In
Join
Get access to thousands of educational resources
Get premium membership
and access revision papers with marking schemes, video lessons and live classes.
OR
Processing. Please wait.
Form 2 Mathematics online video lessons on trigonometric ratios
Evaluate:
7
cos
50.2
°
9.5
sin
60
°
(1m 49s)
1281 Views
SHARE
|
« Previous
Next »
1.
Introduction to trigonometric ratios
2.
Trigonometric ratios from mathematical tables
3.
Evaluate: 8.52 tan 42.2°
4.
Evaluate: 7.9 sin 79°
5.
Evaluate:
69
cos
63.6
°
6.
Evaluate:
7
cos
50.2
°
9.5
sin
?
60
°
7.
Use the figure below to find the unknown angles and sides in each case: (a)
∠
PRQ = 46°, q = 7.83 (b) p = 13.6, q = 17.2
8.
Use the figure below to find the unknown angles and sides in each case: (a)
∠
QPR = 56°10', p = 4.53 (b)
∠
QPR = 47° 35', r = 3.47
9.
In a triangle PQR,
∠
PQR =
∠
PRQ = 58° and QR = 5.2 cm. Calculate the length of PQ.
10.
In a triangle PQR, QR = 5.2 cm and PQ = PR = 8.2 cm. Calculate: (a)
∠
PQR and
∠
QPR. (b) the area of
△
PQR.
11.
In triangle XYZ, XY = XZ = 4.1 cm, XN is the altitude of the triangle, which is 3.2 cm long. Calculate: (a) the base angles of the triangle. (b) the size of the vertex angle. (c) area of triangle XYZ.
12.
Calculate the area of a parallelogram PQRS in which PS = 3.1 cm, PQ = 7.2 cm and
∠
SPQ = 73°.
13.
The figure below shows a regular pentagon PQRST of side 5.2 cm. Find the length of PM if
∠
PMS 90° and M is the midpoint of RS.
14.
A ship moves 4.5km on a bearing of 330°. It then changes its course to a bearing of 270° and moves 11km, then changes its course again to a bearing of 315° for 8km. Find to the nearest km, how far north and west the ship is from the starting point.
×
Share Content Via:
Facebook
Twitter
WhatsApp
Close
Get premium membership