The Unit Circle

The hypotenuse of any right triangle from the center of the unit circle to an edge is always

• 1
• sqt2/2
• sqt3/2
• 1/2

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

• sqt2/2
• 1/2
• 1
• sqt3/2

For what angles are sine and cosine the same?

• 0^o
• 45^o and 135⁰
• 45^o and 225⁰
• 45^o and 315⁰

Tags

CCSS.HSF.TF.B.7

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

• 1
• 0
• -1
• 1/2

cos(60°)

• 0
• 1/2
• √3/2
• 1

sin(0°)

• 0
• 1/2
• √3/2
• 1

Tags

CCSS.HSF.TF.A.2

tan(225°)

• -1
• √2
• 2√3/3
• 1

sin(120°)

• 0
• 1/2
• √3/2
• 1

cos 120

• 1/2
• -1/2
• (square root 3)/2
• (-square root 3)/2

Tags

CCSS.HSF.TF.A.2

The unit circle...

• Has center at (1,1)
• Has a circumference of 1
• Has a diameter of 1
• Has a radius of 1

Tags

CCSS.HSF.TF.A.1