Evaluating Trig Unit Circle Degrees

cos -2π/3

• -√3/2

• √3/2

• 1/2

• -1/2

sin 31π/6

• 1/2

• -1/2

• √3/2

• -√3/2

cos(-17π/6)

• √3/2

• √2/2

• 1/2

• -1/2

• -√3/2

sin(13π/3)

• √3/2

• -√3/2

• 1/2

• -1/2

• √2/2

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

cos 4π/3

• -√3/2

• √3/2

• 1/2

• -1/2

sin(5π/3)=

• 1/2

• -√3/2

• √3/2

• -1/2

sin(7π/4)

• 1/2

• -√2/2

• √2/2

• -1/2

sin(11π/6)

• -1/2

• 1/2

• √3/2

• -√3/2