How to find the angle of inclination of a line.
How to define the tangent function for all angles.
How to evaluate the tangent of 3*pi/4.
How to mark parallel lines, how to show lines are parallel, and how to compare skew and parallel lines.
How to identify parallel lines, a line parallel to a plane, and two parallel planes.
How to restrict the domain of tangent so it will have an inverse function.
How to take the converse of the parallel lines theorem.
How to find the vector and parametric equations of a line when given two points on the line.
How to define the tangent ratio and identify the tangent of an angle in a right triangle.
How to determine whether two lines in space are parallel or perpendicular.
How to write the vector equation of a line.
How to graph y = tan(theta) for 0 <= theta < pi/2.
How to find the polar equation of a line through the origin (or pole).
How to write the parametric equations of a line segment that goes from point A to point B.
How to write equations describing motion in a straight line given the velocity and the position when t=0.
How to graph y = tan(q) for one or more periods.
How to find the x-intercepts and vertical asymptotes of the graph of y = tan(q).
How the number e is defined.
How to convert a polar equation into rectangular form.
How to use inverse trig functions to find angles in right triangles.