Evaluating the Unit Circle

What is the length of the hypotenuse in the special triangles discussed?

• root 3

• root 2

• 2

• 1

Which coordinate represents the sine value in the unit circle?

• x-coordinate

• None of the above

• y-coordinate

• z-coordinate

What is the cosine of PI over 3?

• 1/2

• root 2 over 2

• root 3 over 2

• 0

How is the sine value represented in the unit circle coordinates?

• Not represented

• As the z-coordinate

• As the y-coordinate

• As the x-coordinate

What happens to the tangent function when the denominator is zero?

• It is 0

• It is 1

• It is infinite

• It is undefined

Which quadrant is all trigonometric functions positive?

• Quadrant I

• Quadrant II

• Quadrant III

• Quadrant IV

In which quadrant is sine positive and cosine negative?

• Quadrant IV

• Quadrant III

• Quadrant II

• Quadrant I

What is the sine of 11 PI over 6?

• 1/2

• -1/2

• root 3 over 2

• 0

What is the tangent of PI over 4?

• Undefined

• 0

• -1

• 1

What is the cosine value for the angle 3 PI over 2?

• 1

• 0

• -1

• Undefined