Solve Unit Circle

What is the radius of a unit circle?

• 1

• 2

• 1/2

• 0

What is 360 degrees in radians? 

• 2π/3

• 5π/4

• 2π

• π

Solve sinθ = ½ on θ∈[0, 2π)

• θ = π / 6,  7π / 6

• θ = π / 6,  5π / 6

• θ = 5π / 6,  7π / 6

• θ = 7π / 6,  11π / 6

Solve sinθ = -1 on θ∈[0, 2π)

• θ = π /2, 3π /2 

• θ = π /2

• θ = 3π /2

• θ = π  

Solve
cosθ = - √(3)/2  
on θ∈[0, 2π)

• θ = π /3, 2π /3

• θ = 2π /3, 4π /3

• θ = π /6, 5π /6

• θ = 5π /6, 7π /6

tan 7π/4

• -1

• 1

• √2/2

• undefined

Solve sinθ = ½

• θ = π / 6,  7π / 6

• θ = π / 6,  5π / 6

• θ = 5π / 6,  7π / 6

• θ = 7π / 6,  11π / 6

Solve cosθ = - √(3)/2

• θ = π /3, 2π /3

• θ = 2π /3, 4π /3

• θ = π /6, 5π /6

• θ = 5π /6, 7π /6

Solve sinθ = -1 on θ∈[0, 2π)

• θ = π /2, 3π /2

• θ = π /2

• θ = 3π /2

• θ = π

sin π/4

• √2∕2

• 1/2

• √3/2

• 0