Trig Practice

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

• ½
• √2/2
• √3/2
• 1

• 1
• -1
• 0
• √2/2

• -√3/2
• -½
• -√2/2
• -1

What is the radius of a unit circle?

• 1
• 2
• 1/2
• 0

sinθ is positive in

• the 1st and 2nd quadrants
• the 1st and 3rd quadrants
• the 1st and 4th quadrants
• the 2nd and 3rd quadrants

cosθ is positive in

• the 1st and 2nd quadrants
• the 1st and 3rd quadrants
• the 1st and 4th quadrants
• the 2nd and 3rd quadrants

sin 7π/6

• 1/2
• -1/2
• √3/2
• -√3/2