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