PRECALC 3/30

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 sine at 210?

• 1/2
• -1/2
• √3 / 2
• -√3 / 2

What is the value of cosine at 270

• 0
• 1
• -1

At what point are sine and cosine the same value?

• 0
• 90
• 45
• 60

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)

• -√3/2
• -½
• -√2/2
• -1