4-3 Trig Functions on the Unit Circle

What is the tan of 3π/2?

• -√3
• √3/3
• -1
• Undefined

The unit circle...

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

Based on your unit circle cos(90^o)=

• 1
• 0
• -1
• 1/2

Based on your unit circle sin(0^o)=

• 1
• -1
• 0
• 1/2

Based on your unit circle sin(90^o)=

• 1/2
• 0
• -1
• 1

tan (-π)

• undefined
• 0
• 1
• -1

Tags

CCSS.HSF.TF.A.2

Based on your unit circle cos(0^o)=

• 1
• 0
• -1
• 1/2

4π/3 is equal to how many degrees?

• 60°
• 240°
• 300°
• 120°

π/2 is equal to how many degrees?

• 180°
• 90°
• 135°
• 240°

What is a complete circle in radians?

• π
• 2π
• 1/2 π
• 1