Posted by Rachal on Saturday, May 14, 2011 at 8:21am.
Find the reference angle for 144 degrees.
I'm coming up with 504 degrees, but I think I'm missing a step.

Trig Check my answer Please  Rachal, Saturday, May 14, 2011 at 8:23am
I now think its 36 degrees

Trig Check my answer Please  Anonymous, Saturday, May 14, 2011 at 8:39am
Visually it doesn't make sense for an angle to be negative.
However we often measure angles off of some axis, such as the xaxis, and positive angles go around counterclockwise, while negative angles go around clockwise.
Outside of the context of a Cartesian Coordinate system (xy plane), negative angles don't generally make sense but:
144°=360°144°=216°
Trigonometric Identities for negative angles:
sin(A) =  sin(A)
cos(A) = cos(A)
tan(A) =  tan(A)
cot(A) =  cot(A)
csc(A) =  csc(A)
sec(A) = sec(A)
Answer This Question
Related Questions
 Math  What's the value of the missing angle *picture of a triangle and square ...
 SCIENCE  Seawater of average salinity freezes at about: a. 32 degrees F b. 0 ...
 math  in a pentagon each of the two angles measuer 76 degrees another angle ...
 Math  Four of the angles of a pentagon measure 85 degrees, 110 degrees, 135 ...
 trig  Find the reference angle for each given angle: a) 325 degrees b) 14pi/3 c...
 math  Snell's law of refraction can be written as sin i = n sin r, where n is ...
 MATH PLEASE  can a reference angle be negative? Tye "reference angle" in google...
 Math  3) From two tracking stations A and B, 350 km apart, a UFO is sighted at ...
 Trig  I'm confused on how to determine what the end result angles are for a ...
 math  Snell's law of refraction can be written as sin i = n sin r, where n is ...
More Related Questions