1.4 Reference Angles

What is the reference angle for 125°?

• 235°

• 125°

• 75°

• 55°

What is the reference angle for -30°?

• 150°

• 30°

• 80°

• 60°

What is the reference angle?

• 163

• 73

• 27

• 107

What is the reference angle for 2pi/3

• pi/4
• 7pi/6
• 4pi/3
• pi/3

If θ is an angle in Quadrant I, which trig ratios will be positive

• sin θ
• cos θ
• tan θ
• All the above (sin θ, cos θ, tan θ)

If θ is an angle in Quadrant IV, which trig ratios will be positive

• sin θ
• cos θ
• tan θ
• cos θ and tan θ