Exploring the Unit Circle Fundamentals

What is the sine of 30 degrees?

• 0

• 1/2

• root 3/2

• 1

What is the cosine of 45 degrees?

• 1/2

• 1

• 0

• root 2/2

Which ordered pair represents the cosine and sine of 60 degrees in the unit circle?

• (1, 0)

• (0, 1)

• (root 3/2, 1/2)

• (1/2, root 3/2)

What is the tangent of 45 degrees?

• 1

• 0

• undefined

• root 2

What is the sine of 90 degrees?

• 1

• 0

• root 2/2

• undefined

What is the cosine of 180 degrees?

• 0

• -1

• undefined

• 1

For a 30 degree reference angle in quadrant 2, what is the cosine?

• root 3/2

• -root 3/2

• 1/2

• 0

What is the sine of 225 degrees?

• 1

• 0

• root 2/2

• -root 2/2

What is the tangent of 330 degrees?

• -1

• 1

• undefined

• 0

Which quadrant has both sine and cosine as negative?

• Quadrant II

• Quadrant III

• Quadrant I

• Quadrant IV