Finding Exact Values Using Unit Circle

Based on the unit circle, what is the value of tan?

• y/r

• x/r

• r/y

• y/x

 tan 2π = 

• 0

• 1

• -1

• undefined

What is the measure of the given angle?

• 17pi/4

• 9pi/4

• -pi/4

• -7pi/4

tan (π/6)

• -√3

• 2

• -1 / 2

• √3 / 3

sin 0

• 1

• -1

• 0

• Undefined

cos (7π/6)

• -√2 / 2

• √3 / 2

• -√3 / 2

• -1 / 2

cos 300º

What is sin 45°?

• 1
• ^√3/₂
• ½
• ^√2/₂

cos 240º

tan 225º

• 1

• -1

• 0

• undefined