PreCalc Quiz Review 6.2 (Unit Circle and Trig Evaluations)

The unit circle...

• Has center at (1,1)
• Has a circumference of 1
• Has a diameter of 1
• Has a radius of 1

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

• 1

• 1/√2

• √3/2

• 1/2

How many degrees is ^π/₆ radians?

• 90°
• 60°
• 45°
• 30°

How many degrees is ^π/₄ radians?

• 30°
• 45°
• 60°
• 90°

How many degrees is ^π/₂ radians?

• 30°
• 45°
• 60°
• 90°

How many degrees is ^π/₃ radians?

• 30°
• 45°
• 60°
• 90°

225°=?

• π/6
• π/4
• 5π/4
• -π/6

7π/6=?

• 300°
• 30°
• 120°
• 210°

What is a complete circle in radians?

• π
• 2π
• 1/2 π
• 1

What is 5π/6 radians in degrees?

• 180
• 150
• 360
• 120