Trig Ratios on the X and Y-Axes: Using Coordinates of the Unit Circle

This video tutorial explains the trigonometric ratios of sine, cosine, and tangent using the unit circle. It covers how to determine these ratios at quadrantal angles, where either the x or y coordinate is zero. The tutorial also discusses the conditions under which trigonometric ratios are undefined, emphasizing the importance of recognizing these angles in both degrees and radians. The lesson concludes with a summary of key concepts and examples to reinforce understanding.

What happens to the trig ratios when x is 0 on the y-axis?

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Identify the angles that have a y-coordinate equal to 0.

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How do you find the sine, cosine, and tangent of angles on the unit circle?

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