Unit Circle

What is the value of cosine at 0

• 0
• 1/2
• 1
• √3 / 2

What is the value of sine at 30

• 1/2
• √3 / 2
• 0
• √2 ⁄ 2

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

What is the value of cosine at 270

• 0
• 1
• -1

What is the value of sine at 150

• 0
• 1/2
• 1
• √3 / 2

sin π/4

• √2∕2
• 1/2
• √3/2
• 0

cos 5π/6

• -1/2
• 1/2
• √3/2
• -√3/2

cos 4π/3

• -√3/2
• √3/2
• 1/2
• -1/2