Converting between Degrees and Radians
45°
π/4
What is the reference angle of -240 degrees?
60 degrees
sin 150
1/2
sin 4π/3
-√3/2
In the second quadrant, you have a point (-√11/6, y). Solve for y
5/6
2π/3
120°
What is the reference angle for 241 degrees?
61 degrees
cos 240
-1/2
cos 5π/6
-√3/2
In the fourth quadrant, you have a point (x, -3/7). Solve for x
2√10/7
690°
23π/6
What is the reference angle for 98 degrees?
82 degrees
cos 420
1/2
tan 11π/6
-1/√3
In the fourth quadrant, you have a point (x, -6/7). Solve for x
√13/7
19π/6
570°
If cos is positive AND the reference angle is 20 degrees, give all angles in degrees and radians in the standard unit circle.
20 degrees, π/9
340 degrees, 17π/9
tan 210
√3/3
sin 18π/6
-1
In the second quadrant, you have a point (x, 1/3). Solve for x
-2√2/3
4π/3
240°
If tan is negative AND the reference angle is 80 degrees, give all angles in degrees and radians in the standard unit circle.
100, 5π/9
280, 14π/9
tan 480
-√3
1/√3
In the third quadrant, you have a point (-√13/7, y). Solve for y
-6/7