4.4 Reference Angles by RHO

15°

Find the reference angle for -165°

π/3

Find the reference angle for -2π/3

2π/5

Find the reference angle for -3π/5

0

Find the reference angle for -π

π/7

Find the reference angle for -π/7

10°

Find the reference angle for 10°

1.056

Find the reference angle for 11.51

π/6

Find the reference angle for 11π/6

60°

Find the reference angle for 120°

45°

Find the reference angle for 135°

30°

Find the reference angle for 150°

20°

Find the reference angle for 200°

40°

Find the reference angle for 220°

70°

Find the reference angle for 250°

71°

Find the reference angle for 289°

0.558

Find the reference angle for 3.7

32°

Find the reference angle for 392°

π/2

Find the reference angle for 3π/2

π/4

Find the reference angle for 3π/4

45°

Find the reference angle for 495°

3π/7

Find the reference angle for 4π/7

2π/7

Find the reference angle for 5π/7

3π/8

Find the reference angle for 5π/8

75°

Find the reference angle for 75°

π/6

Find the reference angle for 7π/6

π/4

Find the reference angle for π/4