Practice Angles in Unit Circle

What is the value of θ, theta, in degrees on the unit circle?

• 30°

• 45°

• 60°

• 90°

What is this angle in radians?

What is tan 60°?

• 1

• ½

• √3

• ^√3/₃

Using θ as a reference angle, mark the triangle sides as Opp, Adj, and Hyp. Label these on the triangle on your paper.

• Opp

• x

• Hyp

• OP

• Adj

• y

What is tan 45°?

• 1
• ^√2/₂
• ^√3/₂
• ½

Using θ as a reference angle, mark the triangle sides as Opp, Adj, and Hyp. Label these on the triangle on your paper.

• Opp

• y

• Adj

• x

• Hyp

• OP

What is tan 90°?

• 1
• undefined
• 0
• ½

Mathematical Equivalence

ON