Find coterminal angles in both degrees and radians

Question

What is the negative and positive coterminal of 3pi

Answer 1

Coterminal angles can be found by adding or subtracting 2π. A positive coterminal angle can be found by adding 2π and a negative coterminal angle can be found by subtracting 2π.

Positive Coterminal

3π + 2π = 5π

Negative Coterminal

3π - 2π = π

Do it one more time to find the negative:

π - 2π = - π