Coordinate Geometry What is
How can you use the diagram?
The vector and the x-axis form a right triangle. You know the length of the hypotenuse and the measure of one acute angle.
Use the sine and cosine ratios to find the values of x and y.
L is in the fourth quadrant, so the y-coordinate is negative.
What is the vector below as an ordered pair? Round the coordinates to the nearest tenth.
In many applications of vectors, you use the compass directions north, south, east, and west to describe the direction of a vector.
What is the direction of each vector using compass directions?
How do you start?
Look at the given angle in relation to the north-south line (vertical) or the west-east line (horizontal).
The angle is below (south) the west-east line, on the east side. The vector is
The angle is to the right (east) of the north-south line, on the north side. The vector is
Reasoning Is there more than one way to describe the direction of this vector? Explain.