Unit Circle.

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Presentation transcript:

Unit Circle

Unit Circle Circle whose radius is 1 unit 1 y x

Trig Ratios Reciprocals!

Special Right Triangle: 30-60-90 60° Find the missing parts. 2x x 60° 30° 40 60° 44 30° 30° Check using Pythagorean Theorem:

Trig Ratios for 30-60-90 60° 2x x 30°

Special Right Triangle: 45-45-90 45° Now check using Pythagorean Theorem: x 2 45° x

Trig ratios for 45-45-90 45° x 45° x

Special Right Triangles Recap Now, let’s put these on the unit circle!

NOTE: (cos, sin)

Use the unit circle to find the following:

Use the unit circle to find the following:

Use the unit circle to find the following:

Homework Worksheet