Unit Circle

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)

sin 7π/6

• 1/2
• -1/2
• √3/2
• -√3/2

cos (π/4)

• √3/2
• √2/2
• 1/2
• 1

cos(5π/3)

• -√2/2
• -1/2
• 1/2
• √3/2

What is cos 60°?

• ½
• ^√3/₂
• ^√2/₂
• 1

What is sin 45°?

• 1
• ^√3/₂
• ½
• ^√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 135

• 0
• 1/2
• √2 /2
• -√2 /2

What is the value of cosine at 270

• 0
• 1
• -1

What is the value of cosine at 315

• 0
• 1
• √2 / 2
• -√2 /2