Posted by **Joe** on Sunday, January 6, 2008 at 11:30am.

I need help with this.. it's for my midterm review. My midterm is next week. I would appreciate the help.

Determine two coterminal angles (one positive and one negative) for each angle. The answer must be in degrees.

a) 36 degrees

b) -120 degrees

c) 300 degrees

d) -420 degrees

- Coterminal Angles -
**Reiny**, Sunday, January 6, 2008 at 11:56am
adding or subtracting multiples of 360º to any angle will result in the rotating arm ending in the same position, thus giving you "coterminal" angles

so 36º + 360º = 396º

36 - 360 = -324

so that to each of your angles.

(for -420 you will have to add 720 to obtain a positive result)

- Coterminal Angles -
**Joe**, Sunday, January 6, 2008 at 12:12pm
Thx! I really do understand it now. What if they give me like pi/9.... How do i find two coterminal angles (one positive and one negative) in RADIANS.

- Coterminal Angles -
**Vipul**, Wednesday, August 13, 2008 at 8:58pm
I need help on coterminals, I have NO! idea on how to do it

- Coterminal Angles -
**Damon**, Sunday, January 6, 2008 at 12:44pm
360 degrees is 2 pi radians so adding or subtracting 2 pi (or a multiple of 2 pi) to an angle in radians brings you to the same place.

- positive coterminal angle of 120 degree? -
**renztane**, Tuesday, February 26, 2008 at 2:52am
-120 degree

- positive coterminal angle of 120 degree? -
**renztane**, Tuesday, February 26, 2008 at 2:54am
480 degre

- positive coterminal angle of 120 degree? -
**luis**, Thursday, May 22, 2008 at 9:48pm
820

- coterminal angles -
**Neko**, Monday, April 14, 2008 at 8:01pm
how do i get a coterminal angle from something like pi/6 ????????

- Coterminal Angles -
**Jon**, Thursday, August 11, 2011 at 11:57pm
so I have the conterminal angle of 111 degree. So do I add and subtract with 360 degree or 180 degree?

- Coterminal Angles -
**astro boy**, Tuesday, June 5, 2012 at 10:50pm
lol this was one of my final questions for trig/precal

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