How do you find an angle with a positive measure and an angle with a negative measure that are coterminal with #620^circ#?

1 Answer
Feb 5, 2018

Add and subtract one full rotation #(360^@)# until you get a positive angle or negative angle, respectively.

Explanation:

If you have a #620^@# angle, you could either add #360^@#

#620^@ + 360^@ = 980^@#

or subtract #360^@#

#620^@-360^@ = 260^@#

Since both of these angles are positive co-terminal angles, either one is a correct answer to your question. In order to find a negative coterminal angle, simply keep subtracting until you get a negative number.

#620^@-360^@=260^@#

then

#260^@-360^@=-100^@ -># a negative coterminal angle

Hope this helps!