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behind it are both directly north of him. How far did he just row? Homework 4.1 1. Use the Law of Sines to find all possible triangles satisfying the given conditions. (a) a = 28, b = 15, A = 110° (b) a = 25, b = 30, A = 25° (c) a = 20, b = 45, A = 125° (d) a = 42, b = 45, A = 38° 2. A tree on a hillside casts a shadow 215 ft down the hill. If the angle of inclination of the hillside is 22°, and the angle of elevation of the sun is 52°, find the height of the tree. 3. A hiker is approaching a mountain. The top of the mountain is at an angle of elevation of 25°. After the hiker crosses 800 ft of level ground directly towards the mountain, the angle of elevation becomes 29°. Find the height of the mountain. 4. To find the distance across a river a surveyor chooses points A and B, which are 200 feet apart on one side of the river. She then chooses a reference point C on the opposite side of the river and finds that the angles ?BAC = 82° and ?ABC = 52°. Approximate the distance across the river.

          behind it are both directly north of him. How far did he just row?
Homework 4.1
1. Use the Law of Sines to find all possible triangles satisfying the given conditions.
(a) a = 28, b = 15, A = 110°
(b) a = 25, b = 30, A = 25°
(c) a = 20, b = 45, A = 125°
(d) a = 42, b = 45, A = 38°
2. A tree on a hillside casts a shadow 215 ft down the hill. If the angle of inclination of the hillside is 22°, and the angle of elevation of the sun is 52°, find the height of the tree.
3. A hiker is approaching a mountain. The top of the mountain is at an angle of elevation of 25°. After the hiker crosses 800 ft of level ground directly towards the mountain, the angle of elevation becomes 29°.
Find the height of the mountain.
4. To find the distance across a river a surveyor chooses points A and B, which are 200 feet apart on one side of the river. She then chooses a reference point C on the opposite side of the river and finds that the angles ?BAC = 82° and ?ABC = 52°.
Approximate the distance across the river.

behind it are both directly north of him. How far did he just row?
Homework 4.1
1. Use the Law of Sines to find all possible triangles satisfying the given conditions.
(a) a = 28, b = 15, A = 110°
(b) a = 25, b = 30, A = 25°
(c) a = 20, b = 45, A = 125°
(d) a = 42, b = 45, A = 38°
2. A tree on a hillside casts a shadow 215 ft down the hill. If the angle of inclination of the hillside is 22°, and the angle of elevation of the sun is 52°, find the height of the tree.
3. A hiker is approaching a mountain. The top of the mountain is at an angle of elevation of 25°. After the hiker crosses 800 ft of level ground directly towards the mountain, the angle of elevation becomes 29°.
Find the height of the mountain.
4. To find the distance across a river a surveyor chooses points A and B, which are 200 feet apart on one side of the river. She then chooses a reference point C on the opposite side of the river and finds that the angles ?BAC = 82° and ?ABC = 52°.
Approximate the distance across the river.

Added by Kristin C.

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