Reference Angles
Find the reference angle for 210 degrees
30 degrees
What are the cos and sin values at π/2 on the unit circle?
cos is 0 and sin is 1
What is sin on the unit circle?
the y value of a point
What are the coordinates of the point on the unit circle at an angle of 45 degrees?
(square root 2)/2, (square root 2)/2
What is the value of tangent (5π3)?
Negative square root of 3
Find the reference angle for 240 degrees
60 degrees
Which quadrants have cosine as a positive values?
Quadrants, I and IV.
What is cos on the unit circle?
The x value of a point
What are the coordinates of the point on the unit circle at 2π/3?
-1/2, (square root 3)/2
What is sin(π/2)?
-1
Determine the reference angle for 5π/4
π/4
What is the value of sin at π?
0
What is the fraction of tan on the unit circle?
y/x
What is the circumference and radius of the unit circle?
2π and 1
What is the value of sin(π/6)?
1/2
Determine the reference angle for 11π/6
π/6
Which quadrants have tangent as a negative value?
Quadrants II and IV
What is sin(300)?
-(square root 3)/2
Which radian angle has cos of √3/2 and sin of 1/2?
π/6
What is the value of cos(120)?
-1/2
Determine the reference angle for 5π/3
π/3
Which quadrants have sine as positive values?
Q1 and Q2
What is tan(7π/4)?
-1
Which radian angle has cos of -1/2 and sin of √3/2?
2π/3
What is tan(330)?
negative (square root 3)/3