10A x and y components in the unit circle for different angles and their ratios

Reason For Learning

When you work with angles in all four quadrants, the trig ratios for those angles are computed in terms of the values of x, y, and r, where r is the radius of the circle that corresponds to the hypotenuse of the right triangle for your angle. Leads to higher math levels.

Learning Intention

That the "Unit Circle" is just a circle with a radius of 1. How to place a point on x and y axes in a unit circle. How to use radians instead of angles. How to work with angles in all four quadrants.

Key Vocabulary Terms

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ACMMG274 Level 11

Use the unit circle to define trigonometric functions, and graph them with and without the use of digital technologies