Effectiveness of Using Video-Assisted Instruction in Teaching
Selected Topics in Trigonometry
Pretest
A. Direction: Solve for the following and choose the correct answer.
1. The triangle ABC measures A= 67°, c=125 and a=100. What is the value of c?
a.1.01506 b. 2.05 c.0.506
2. The equation for the Law of Sine is
a. b. c.
3. Approximate the remaining parts of triangle ABC if a= 12.4, b=8.7 and B=36.°40’
a. 58°20’ b. 60°15’ c. 55°20’
4. The Law of Sine is ost useful when?
I. Two angles and a side opposite one of the angles.
II. Two sides and an angle opposite one of the sides.
III. Two sides and two angles opposite to one another.
a. I and III b. I and II c. II and III
5-6. Solve the triangle.
5. What is the value of angle C?
a. 101°40’ b. 180° c. 100°
6. What is the value of side c?
a. 125 km b. 152 km c. 215 km
7-8. Solve the triangle.
7. What is the measure of the angle C?
a. 26° b. 30° c. 62°
8. What is the length of the side c?
a. 15m b. 10m c. 12m
9. What is the measure of the side c if B=12°, C=100° and b= 13 km?
a. 12 km b. 11.5 km c. 10.83 km
10. If the triangle ABC measures B=77°, C=62°, and c=74 cm. What is the length of the side b?
a. b . c.
B. Direction: Solve for the following and identify the correct answer.
11. a= 14m, B=33° and A= 41°
a. b. c.
12. A=15°, B=65° and a= 40cm
a. b. c.
13.A= 52°, B=105° and c=12m
a. b. c.
14. A= 54°, a=10in and B=37°
a. b. c.
15. a=23cm,b=20cm and B=37°
a. b. c.
16. a=50m, c=40m and C=30°
a. b. c.
17. a=49yd, b=100 yd and A=20°
a. b. c.
18. b= 3m, c= 9m and C= 12°
a. b. c.
19. a= 27m, C=48° and c= 11m
a. b. c.
20. a= 16m, c= 20m and A= 36°
a. b. c.
21. In triangle DEF, side e = 8 cm, f = 10 cm, and the angle at D is 60°. Find side d.
- b. c. .
22. In the oblique triangle PQR, find side r if side p = 5 in,q = 10 in, and they include an angle of 14°.
a. in. b. in. c. in.
- In the oblique triangle ABC, find side b if side a = 5 cm,c = cm, and they include an angle of 45°.
- cm b. cm c.cm
24. , side b = 12, side c = 20 and m<A = 45º. Find side a .
- 13 b. 15 c.14
25. In a parallelogram, the adjacent sides measure 40 cm and 22 cm. If the larger angle of the parallelogram measure 116º, find the length of the larger diagonal
a.53 b. 63 c. 73
26. b= 12m, c=16m and B=62°
a. b. c.
27. a=5m, c=10m and A=92°
a. b. c.
28. a= 52cm,c=88cm and C=38°
a. b. c.
29. a=9in, b=5in and A=43°
a. b. c.
30. a=13in, b=8in and B=101°
a. b. c.
Effectiveness of Using Video-Assisted Instruction in Teaching
Selected Topics in Trigonometry
Posttest
A. Direction: Solve for the following and choose the correct answer.
29. a=9in, b=5in and A=43°
a. b. c.
27. a=5m, c=10m and A=92°
a. b. c.
25. In a parallelogram, the adjacent sides measure 40 cm and 22 cm. If the larger angle of the parallelogram measure 116º, find the length of the larger diagonal
a.53 b. 63 c. 73
- In the oblique triangle ABC, find side b if side a = 5 cm,c = cm, and they include an angle of 45°.
- cm b. cm c.cm
21. In triangle DEF, side e = 8 cm, f = 10 cm, and the angle at D is 60°. Find side d.
- b. c. .
19. a= 27m, C=48° and c= 11m
a. b. c.
17. a=49yd, b=100 yd and A=20°
a. b. c.
15. a=23cm,b=20cm and B=37°
a. b. c.
13.A= 52°, B=105° and c=12m
a. b. c.
11. a= 14m, B=33° and A= 41°
a. b. c.
9. What is the measure of the side c if B=12°, C=100° and b= 13 km?
a. 12 km b. 11.5 km c. 10.83 km
7-8. Solve the triangle.
7. What is the measure of the angle C?
a. 26° b. 30° c. 62°
8. What is the length of the side c?
a. 15m b. 10m c. 12m
3. Approximate the remaining parts of triangle ABC if a= 12.4, b=8.7 and B=36.°40’
a. 58°20’ b. 60°15’ c. 55°20’
4. The Law of Sine is ost useful when?
I. Two angles and a side opposite one of the angles.
II. Two sides and an angle opposite one of the sides.
III. Two sides and two angles opposite to one another.
a. I and III b. I and II c. II and III
a.1.01506 b. 2.05 c.0.506
2. The equation for the Law of Sine is
a. b. c.
5-6. Solve the triangle.
5. What is the value of angle C?
a. 101°40’ b. 180° c. 100°
6. What is the value of side c?
a. 125 km b. 152 km c. 215 km
1. The triangle ABC measures A= 67°, c=125 and a=100. What is the value of c?
a.1.01506 b. 2.05 c.0.506
30. a=13in, b=8in and B=101°
a. b. c.
28. a= 52cm,c=88cm and C=38°
a. b. c.
26. b= 12m, c=16m and B=62°
a. b. c.
24. , side b = 12, side c = 20 and m<A = 45º. Find side a .
- 13 b. 15 c.14
22. In the oblique triangle PQR, find side r if side p = 5 in,q = 10 in, and they include an angle of 14°.
a. in. b. in. c. in.
20. a= 16m, c= 20m and A= 36°
a. b. c.
18. b= 3m, c= 9m and C= 12°
a. b. c.
16. a=50m, c=40m and C=30°
a. b. c.
14. A= 54°, a=10in and B=37°
a. b. c.
12. A=15°, B=65° and a= 40cm
a. b. c.
10. If the triangle ABC measures B=77°, C=62°, and c=74 cm. What is the length of the side b?
a. b . c.
