The unit circle

Front

What is true about the unit circle? Options: a. The center of the circle is at the origin, b. the radius of the circle is 1 unit, both a and b, neither a nor b.

Back

Both a and b

Tags

CCSS.HSF.TF.A.2

Front

What are the coordinates of 60° on the unit circle?

Back

(1/2, √3/2)

Tags

CCSS.HSF.TF.A.2

Front

sinθ is positive in

Back

the 1st and 2nd quadrants

Tags

CCSS.HSF.TF.A.2

Front

cosθ is positive in

Back

the 1st and 4th quadrants

Tags

CCSS.HSF.TF.A.2

Front

What is sin 45°?

Back

^√2/₂

Tags

CCSS.HSF.TF.A.2

Front

What is cos 30°?

Back

^√3/₂

Tags

CCSS.HSF.TF.A.2

Front

Exact coordinates of  3π/4 on the unit circle?

Back

(−√2∕2, √2∕2)

Tags

CCSS.HSF.TF.A.2

Front

What is cos 90°?

Back

0

Tags

CCSS.HSF.TF.A.2

Front

sin π/4

Back

√2∕2

Tags

CCSS.HSF.TF.A.2

Front

Which of the following is the equation of a unit circle? x² + y² = 0, x² + y² = 1, (x + 1)² + y² = 1, (x + 1)² + (y + 1)² = 1

Back

x² + y² = 1

Tags

CCSS.HSG.GPE.A.1