Unit Circle Practice

What is a complete circle in radians?

• π
• 2π
• 1/2 π
• 1

What is the value of sine at 210°?

• 1/2

• -1/2

• √3 / 2

• -√3 / 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

sin 7π/6

• 1/2
• -1/2
• √3/2
• -√3/2

cos 4π/3

• -√3/2
• √3/2
• 1/2
• -1/2

sin 2π/3

• 1/2
• -1/2
• √3/2
• -√3/2

What are 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)

tan 7π/4

• -1
• 1
• √2/2
• undefined