19 A surveyor is standing 50 feet from the base of a large tree A surveyor is standing 50 feet from the base of a large tree. The surveyor measures the angle of elevation to the top of the tree as 71.5°. How tall is the tree?tan 71.5°?tan 71.5°71.5°y = 50 (tan 71.5°)50y = 50 ( )
20 A person is 200 yards from a river A person is 200 yards from a river. Rather than walk directly to the river, the person walks along a straight path to the river’s edge at a 60° angle. How far must the person walk to reach the river’s edge?cos 60°x (cos 60°) = 20020060°xxX = 400 yards
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