1. Find to the nearest degree the measure of the angle of elevation of the sun when a student 170 centimeters tall casts a shadow 170 centimeters long.
Today is Fri
3/9
Do Now:
-Take out HW
-Take Calc
-Test Monday on Trig
2. A boy flying a kite lets out 400 feet of string, which makes an angle of 52° with the ground. Assuming that the string is stretched taut, find to the nearest foot how high the kite is above the ground.
3. A 20­foot ladder leans against a building and makes an angle of 72° with the ground. Find to the nearest foot the distance between the foot of the ladder and the building. 5. An airplane rises at an angle of 14° with the ground. Find to the nearest foot the distance the airplane has flown when it has covered a horizontal distance of 1,500 feet.
4. Find to the nearest meter the height of a building if its shadow is 18 meters long when the angle of elevation of the sun has a measure of 38°.
6. A wooden beam 6 meters long leans against a wall and makes an angle of 71° with the ground. Find to the nearest meter how high up the wall the beam reaches.
7. From the top of a lighthouse 50 meters high, the angle of depression of a boat out at sea has a measure of 15°. Find to the nearest meter the distance from the boat to the foot of the lighthouse, which is at sea level.
Soh
Cah
Toa
*only in right triangles
8. To reach the top of a hill that is 1 kilometer high, one must travel 8 kilometers up a straight road that leads to the top. Find to the nearest degree the measure of the angle that the road makes with the horizontal.
h
o
a