Special Triangles on Unit Circle

At θ = 30°, what is the equivalent angle measure in radians?

• π/2

• π/3

• π/4

• π/6

What is the x-coordinate of the point associated with a 30-degree angle on the unit circle?

• √2/2

• 
  1/2

• 1

• 
  √3/2

What is the hypotenuse length of a 45-45-90 triangle in the unit circle?

• √2

• 1/2

• 1

• 2

In the third quadrant, what are the coordinates for a 60-degree angle?

• (√3/2, -1/2)

• (-1/2, -√3/2)

• (1/2, -√3/2)

• (-√3/2, -1/2)

When drawing a right triangle from any point on the unit circle to the x-axis, the hypotenuse is equal to one.

• True

• False

What is tan 30°?

• ½

• ^√2/₂

• ^√3/₂

• ^√3/₃

The hypotenuse of any right triangle from the center of the unit circle to an edge is always

• 1

• sqt2/2

• sqt3/2

• 1/2

What is the y-coordinate of the point associated with a 120-degree angle on the unit circle?

• 1/2

• √3/2

• -1/2

• -√3/2

You must find the exact value of the following expression. Draw a picture, label AND refer to the special right triangles and the Unit Circle.
(Lesson #4 & Lesson #5)