Sin, Cos and Tan Unit Circle

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

• 1

• 0

• -1

• 1/2

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

• 0

• -1

• 1/2

• 1

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

• 1/2

• 0

• -1

• 1

sin π/4

• √2∕2

• 1/2

• √3/2

• 0

• 1
• 2
• 3
• 4

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

• Hyp

• x

• Adj

• OP

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

• 1

• 1/2

• sqt3/2

• sqt2/2

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

• Opp

• OP

• Adj

• y

• Hyp

• x

• undefined

Answer explanation

sin 0

• 1

• -1

• 0

• Undefined