Homework Help: Coterminal Angles

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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