Suppose wire for a radio antenna is 85 m long and makes a 4° angle with the top of the antenna. If it is assumed that the antenna is perpendicular to the ground, how tall is the antenna?
A high-velocity projectile launched from the ground travels in a straight path and reaches a vertical height of 0.5 miles after covering a horizontal distance of 2 miles. Find the angle of elevation that the path of the projectile makes with the ground.
At a point on the ground 50 feet from the top of a tree, the angle of elevation to the top of the tree is 53.4°. Find the height of the tree.