The Unit Circle

The unit circle...

• Has center at (1,1)
• Has a circumference of 1
• Has a diameter of 1
• Has a radius of 1

Tags

CCSS.HSF.TF.A.2

The hypotenuse of any right triangle from the center of the unit circle to an edge is always

• 1
• sqt2/2
• sqt3/2
• 1/2

Tags

CCSS.HSF.TF.A.2

Based on the unit circle sin (0^o) =

• 1

• -1

• 0

• 1/2

Based on the unit circle sin (90^o) =

• 1/2

• 0

• -1

• 1

For what angles are sine and cosine the same?

• 0^o
• 45^o and 135⁰
• 45^o and 225⁰
• 45^o and 315⁰

Tags

CCSS.HSG.SRT.C.7

Find a coterminal angle to 5°.

• 365°

• 255°

• -220°

• -365°

Tags

CCSS.HSF.TF.A.2

CCSS.HSF.TF.A.4

Find a coterminal angle to 45°.

• 360°

• 405°

• 315°

• 295°

Tags

CCSS.HSF.TF.A.2

CCSS.HSF.TF.A.4

In which quadrant would you find the terminal side of an angle measuring -740°

• 1

• 2

• 3

• 4

In which quadrant is the terminal side of -570⁰

• I

• II

• III

• IV

What is the reference angle for 125°?

• 235°

• 125°

• 75°

• 55°

Tags

CCSS.HSF.TF.A.3