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Lesson: Trigonometric Ratios and the Unit Circle

Learn about trigonometric ratios in the context of the unit circle. In this lesson, we'll see how the quadrant in which an angle lies determines the signs of its sine, cosine, and tangent, and how we can use this knowledge to solve trigonometric equations.

Worksheet: Trigonometric Ratios and the Unit Circle • 20 Questions

Q1:

In which quadrant does lie if and ?

A the first
B the second
C the fourth
D the third

Q2:

In which quadrant does lie if and ?

A the second
B the first
C the fourth
D the third

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