Reference Angles Unit Circle

sin(30)=

• √2/2
• 1/2
• 1
• √3/2

Based on your unit circle cos(30^o)=

• 1
• 1/2
• √3/2
• √2/2

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

• 1
• 0
• -1
• 1/2

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(120^o)=

• -1/2
• √3/2
• -√2/2
• -√3

What two angles have the same value for Tan?

• 0^o

• 45^o and 135⁰

• 45^o and 225⁰

• 45^o and 315⁰

What is the exact value of sin 210°

• -1/2
• -√3/2
• 1/2
• √3/2

What is the exact value of cos 330°

• -1/2
• -√3/2
• 1/2
• √3/2

What is the exact value of cos 135°

• √2/2
• -√2/2
• √3/2
• -√3/2