1. Trig Test Review 2

2. 45°-45°-90°

4. 30°-60°-90°

7. Two trees stand opposite one another, at points A and B, on opposite banks of a river. Distance AC along one bank is perpendicular to BA, and is measured to be 100 feet. Angle ACB is measured to be 79°. How far apart are the trees; that is, what is the width w of the river?

8. Find the distance of a boat from a lighthouse if the lighthouse is 100 meters tall, and the angle of depression is 6°.

9. A tree casts a shadow 21 m long. The angle of elevation of the sun is 60. What is the height of the tree?

10. From the top of a tower, the angle of depression to a stake on the ground is 60. The top of the tower is 80 feet above ground. How far is the stake from the foot of the tower?

11. A ladder leaning against a house makes an angle of 30 with the ground. The foot of the ladder is 7 feet from the foot of the house. How long is the ladder?

12. A 10 meter ladder is leaning aganist a building. The bottom of the ladder is 5 meters from the building. How many meters high is the top of the ladder? Round to the nearest tenth.

13. A 32 foot ramp connects a platform with a sidewalk that is at ground level. If the platform is 6 feet above ground level, what is the angle of elevation of the ramp?