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

sin π/4

• √2∕2
• 1/2
• √3/2
• 0

cos 5π/6

• -1/2
• 1/2
• √3/2
• -√3/2

What is the exact coordinates of  3π/4 on the unit circle?

• (−√2∕2, √2∕2)
• (−√2∕2, −√2∕2)
• (−√3∕2, −√2∕2)
• (√2∕2, −√2∕2)

• ½
• √2/2
• √3/2
• 1

sin 7π/6

• 1/2
• -1/2
• √3/2
• -√3/2

What is the exact value of sin 150°

• -1/2
• -√3/2
• 1/2
• √3/2