Soh Cah Toa Unit Circle

Find cos 45°

• √2

• √2 /2

• 1/2

• √3/2

What is the exact coordinates of  3π/4 on the unit circle?

• (−√2∕2, √2∕2)

• (−√2∕2, −√2∕2)

• (−√3∕2, −√2∕2)

• (√2∕2, −√2∕2)

What is the radius of the unit circle?

• 0

• 1

• 1/2

• √2/2

What are the coordinates of 60° on the unit circle?

• (0, 1)

• (1/2, √3/2)

• (√3/2, 1/2)

• (√2/2, 1/2)

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

• 1

• 1/2

What is the radius of a unit circle?

• 1

• 2

• 1/2

• 0

Give the Ratio for SIN X

• opp/adj

• Adj/hyp

• Opp/hyp
  

• adj/opp

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

• y

• x

• x/y

• y/x

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

• y

• x

• x/y

• y/x

You have a 300 ^o angle. It passes through the point (x, y) on the unit circle. What does x equal?

• -.5

• .5

• .866

• -.866