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Mathematics 14 Online
OpenStudy (anonymous):

Find the reference angle for the given angle. -404° A. 44° B. 46° C. 134° D. 136°

OpenStudy (anonymous):

i guess you are supposed to add 360 repeatedly until you get a number larger than zero

OpenStudy (anonymous):

i tried it. doesnt work. u get -44, then 316..

OpenStudy (anonymous):

oh then i guess i do not know what a "reference angle" is sorry

jimthompson5910 (jim_thompson5910):

-404 is coterminal to 316

jimthompson5910 (jim_thompson5910):

316 is larger than 270 and less than 360, so its in the 4th quadrant

jimthompson5910 (jim_thompson5910):

which means that the reference angle is 360 - 316 = 44

jimthompson5910 (jim_thompson5910):

the rule is: if the angle x is in quadrant IV, then the reference angle y is y = 360-x

OpenStudy (anonymous):

ok thank u so much!

jimthompson5910 (jim_thompson5910):

np

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