1. Lesson 1

1.3. Refresher

Mathematics 30-1 Module 4

Module 4: Foundations of Trigonometry

 

Refresher


Recall that angles in standard position

  • have their vertex at the origin (point (0, 0) on the Cartesian plane)
  • are formed by an initial arm on the positive x-axis and a terminal arm
  • are “swept out” in a counterclockwise direction from the initial arm to the terminal arm

     
    This is a graphic of an angle in standard position. The initial arm is the positive x-axis, the vertex is at the origin, and the terminal arm is in quadrant 2. The angle marked as theta equals 122 degrees.
This is a play button that opens Cartesian Plane.

Open Cartesian Plane. Review the four quadrants in the Cartesian plane.


This is a play button that opens Subtend.

Review the relationships between the terms to subtend, central angle, and arc in Subtend.



Go back to the Are You Ready? section and try the questions again. If you are still having difficulty, contact your teacher.