Unit Circle

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

sin 7π/6

• 1/2
• -1/2
• √3/2
• -√3/2

sin 2π/3

• 1/2
• -1/2
• √3/2
• -√3/2

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

• 1
• 0
• -1
• 1/2

cos(60°)

• 0
• 1/2
• √3/2
• 1

What is the exact value of sin 150°

• -1/2
• -√3/2
• 1/2
• √3/2

What is a complete circle in radians?

• π
• 2π
• 1/2 π
• 1

What is half a circle in radians?

• π/4
• π
• 2π
• π/2