Unit Circle (version A) - Examen
- 1. The magnitude of the radius of a unit circle is
A) √2/2
B) r
C) √3/2
D) π
E) 1
- 2. The sine of an angle is equal to
A) r
B) theta
C) 1
D) y
E) x
- 3. How many degrees in a unit circle?
A) 1
B) 360
C) 180
D) 2π
E) π
- 4. The cosine of an angle is equal to
A) 1
B) theta
C) y
D) x
E) r
- 5. The magnitudes of the maxima and minima of the unit circle's sine and cosine are the same.
A) Can't be determined
B) false
C) true
D) Neither
- 6. The range of a cosine curve from the unit circle
A) 0 to 2π
B) 0 to 360
C) -infinity to +infinity
D) -1 to 1
- 7. For the unit circle, the zero of the sine function occur
A) 0 degrees
B) neither 0 nor 180 degrees
C) 90 and 270 degrees
D) Both 0 and 180 degrees
E) 180 degrees
- 8. The maximum value of the cosine curve for the unit circle occurs at
A) 180 degrees
B) 270 degrees
C) 0 degrees
D) 90 degrees
- 9. For the unit circle, if I translate the sine curve XXX radians, it will be in the same position as the cosine curve.
A) -π
B) π
C) 2π
D) π/2
E) -π/2
- 10. The sine of 90 degrees equals
A) 1
B) 1/2
C) √2/2
D) -√2/2
E) 0
- 11. The cosine of 45 degrees equals
A) 1/2
B) -√2/2
C) √2/2
D) √3/2
E) 45
- 12. 390 degrees is co-terminal with
A) -30 degrees
B) -390 degrees
C) 30 degrees
D) 330 degrees
A) 1/2
B) 1
C) √3/2
D) 0
E) 180 degrees
- 14. π radians is co-terminal with
A) 3π radians
B) 1/2 radians
C) 3π/2 radians
D) -π radians
E) 2π radians
- 15. 3π/4 radians is the same as
A) 315 degrees
B) 225 degrees
C) 135 degrees
D) 3π/2 radians
E) 45 degrees
- 16. Sine and Cosine are both negative in quadrant
A) III
B) IV
C) never
D) I
E) II
- 17. How many radians in a unit circle?
A) π
B) 3π
C) π/2
D) 2π
E) 3π/2
- 18. One cycle of the sine and cosine curve from the unit circle have the same period.
A) False
B) True
C) Neither
D) Can't be determined
- 19. 180 degrees is equal to
A) 2π radians
B) π/2 radians
C) π radians
D) 360 degrees
- 20. The cosine function is negative and the sine function is positive in quadrant
A) II
B) III
C) I
D) IV
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