Degrees, Radians, Co-Terminal and Reference Angles

What are the negative and positive coterminal angles of -225 degrees?

• 375°, -600°

• 125°, -356°

• 135°, -585°

• 60°, -120°

What is the reference angle for 125°?

• 235°

• 125°

• 75°

• 55°

What is the reference angle for -30°?

• 150°

• 30°

• 80°

• 60°

If you had to evaluate the sin 330 degrees, what is the reference angle you would use?

• 60 degrees

• 30 degrees

• 45 degrees

• None of the above

• 60 degrees

• 30 degrees

• 45 degrees

• None of the above

• 60 degrees

• 30 degrees

• 45 degrees

• None of the above

• 90 degrees

• 30 degrees

• 45 degrees

• 60 degrees

To evaluate cos 120 degrees, you would draw a 30-60-90 triangle in what quadrant?

• 1st

• 2nd

• 3rd

• 4th