The Unit Circle

sec 3π/2

• 0
• undefined
• 1
• -1

tan 7π/4

• -1
• 1
• √2/2
• undefined

sin 7π/6

• 1/2
• -1/2
• √3/2
• -√3/2

tan (-π)

• undefined
• 0
• 1
• -1

What quadrant is -2π/3 in?

• I

• II

• III

• IV

tanθ is positive in

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

If sin > 0 and cos < 0, what quadrant are we in?

• I

• II

• III

• IV

Evaluate: csc(3π/4)

• √2/2

• -√2/2

• √2

• -√2

sin (π/2)

• √3/2
• √2/2
• 1/2
• 1

cos (π/4)

• √3/2
• √2/2
• 1/2
• 1