Circle Unit Review

The unit circle...

• Has center at (1,1)
• Has a circumference of 1
• Has a diameter of 1
• Has a radius of 1

Based on your unit circle sin(30^o)=

• sqt2/2
• 1/2
• 1
• sqt3/2

Based on your unit circle cos(30^o)=

• 1
• 1/2
• sqt3/2
• sqt2/2

Based on your unit circle cos(0^o)=

• 1
• 0
• -1
• 1/2

Based on your unit circle cos(90^o)=

• 1
• 0
• -1
• 1/2

Based on your unit circle sin(0^o)=

• 1
• -1
• 0
• 1/2

Based on your unit circle sin(90^o)=

• 1/2
• 0
• -1
• 1

For what angles are sine and cosine the same?

• 0^o
• 45^o and 135⁰
• 45^o and 225⁰
• 45^o and 315⁰

What is the exact value of cos 330°

• -1/2
• -√3/2
• 1/2
• √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)