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# Chapter 8 Trig

### Unit 2 Geometry Chapter 8 Trigonometry

Angle of Depression The angle formed by a horizontal line and a line of sight to a point below.
Angle of Elevation The angle of formed by a horizontal line and a line of sight to a point above.
Component Form The form of a vector that lists the vertical and horizontal change from the initial point to the terminal point.
Cosine The ratio of the length of the leg adjacent to an angle to the length of the hypotenuse in a right triangle.
Direction The angle made by a vector with a horizontal line, measured counterclockwise from the positive x-axis.
Equal Vectors Two vectors that have the same magnitude and the same direction.
Geometric Mean For positive numbers a and b, the positive number x such that a/x = x/b.
Magnitude The length of a vector.
Parallel Vectors Vectors with the same or opposite direction.
Resultant Vector The vector that represents the sum of two given vectors.
Sine The ratio of the length of the leg opposite an angle to the length of the hypotenuse in a right triangle.
Tangent The ratio of the length of the leg opposite an angle to the length of the leg adjacent to an angle in a right triangle.
Trigonometric Ratio A ratio of two sides of a right triangle.
Vector A quantity that has both magnitude and direction.
Created by: rgilpatric