Identify Angles on a Unit Circle

cos(60^°)=

• -1/2

• √3/2

• 1/2

• 1

tan(90^°)=

• -1

• 1

• undefined

• 0

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

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

Are the given angles coterminal?
35° and -325°

• Yes, they are coterminal
• No, they are not coterminal

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(30^o)=

• 1
• 1/2
• (√3)/2
• (√2)/2

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

• 1
• 0
• -1
• 1/2

For what angles are sine and cosine the same?

• 0^o
• 45^o and 135⁰
• 45^o and 225⁰
• 45^o and 315⁰

What the coordinates of 180° on the unit circle?

• 0, 1
• 1, 0
• -1, 0
• 0, -1

What is tan 45°?

• 1
• ^√2/₂
• ^√3/₂
• ½