How to write the vector equation of a line.
How to define a tangent line; how to determine the angle a radius to a tangent forms.
How to find the vector and parametric equations of a line when given two points on the line.
How to write the equation of a graphed line.
How to write the parametric equations of a line segment that goes from point A to point B.
How to find the polar equation of a line through the origin (or pole).
How to find the angle of inclination of a line.
How to use point-slope form of a line.
How to define the tangent function for all angles.
How to write equations describing motion in a straight line given the velocity and the position when t=0.
How to evaluate the tangent of 3*pi/4.
How to define and label a line segment.
How to construct a perpendicular line at a point on a line.
How to mark parallel lines, how to show lines are parallel, and how to compare skew and parallel lines.
How to write the equation of a line in point-slope form.