Unit Circle

Front

In what quadrant is ONLY sine positive?

Back

II

Front

What is the radius of the unit circle?

Back

1

Front

Based on your unit circle, sin(90°) = ?

Back

1

Front

In what quadrant is ONLY tangent positive?

Back

III

Front

Based on your unit circle, sin(0°) = ?

Back

0

Front

What is the center of the unit circle?

Back

(0, 0)

Front

What is the circumference of the unit circle?

Back

2π

Front

What is the value of cos(90°)?

Back

0

Front

What is the value of tan(45°)?

Back

1

Front

In which quadrants is cosine positive?

Back

I and IV