Unit Circle

What is the radius of the unit circle?

• 0
• 1
• 1/2
• √2/2

What is the value of cosine at 135

• 0
• 1/2
• √2 /2
• -√2 /2

What is the value of sine at 210?

• 1/2
• -1/2
• √3 / 2
• -√3 / 2

At what point are sine and cosine the same value?

• 0
• 90
• 45
• 60

What is the value of sine at 330

• 1/2
• -1/2
• √3 / 2
• -√3 / 2

What is cos 60°?

• ½
• ^√3/₂
• ^√2/₂
• 1

What is sin 30°?

• ^√3/₂
• 1
• ½
• ^√2/₂

How many degrees is ^π/₄ radians?

• 30°
• 45°
• 60°
• 90°

10π/9  is equal to how many degrees?

• 100°
• 140°
• 190°
• 200°

What is the arc length of one quadrant of the unit circle?

• 0.25
• π
• π/3
• π/2