Transcript Slide 1

Trig Test Review 2
45°-45°-90°
45°-45°-90°
30°-60°-90°
30°-60°-90°
30°-60°-90°
• 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?
• Find the distance of a boat from a lighthouse if
the lighthouse is 100 meters tall, and the
angle of depression is 6°.
• A tree casts a shadow 21 m long. The angle of
elevation of the sun is 60. What is the height
of the tree?
• 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?
• 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?
• 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.
• 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?