Unit Circle

What is the exact value of sin (π/4)

• √2∕2

• 1/2

• √3/2

• 0

What is the exact value of cos (5π/6)

• -1/2

• 1/2

• √3/2

• -√3/2

What is the exact value of cos (60°)

• 0

• 1/2

• √3/2

• 1

What is the exact value of sin (150°)

• -1/2

• -√3/2

• 1/2

• √3/2

Find the exact value of the cos (225⁰)

• -√3/2

• √3/2

• √2/2

• -√2/2

sec(90^o)

• UND
• 1
• -1
• 0

What are the coordinates of  210° on the unit circle?

• (−√3/2, −1/2)
• (√3/2, −1/2)
• (−√3/2, 1/2)
• (−1/2,−√3/2 )

• Undefined  

tan(135^o)

• -√2/2
• -√3/2
• -√3/3
• -1

cot(4π/3)

• - √3/2
• 1
• -√3
• √3/3