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Mathematics 44 Online
OpenStudy (anonymous):

I've been given this question: given 210 degrees, find the reference angle for the remaining quadrants I,II, III, IV.

OpenStudy (dumbcow):

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OpenStudy (anonymous):

why no formula in quadrant IV?

OpenStudy (dumbcow):

haha i couldnt think of one...but notice once you have the reference angle of 30 you can find all the others by adding/subtracting from center line

OpenStudy (anonymous):

I see..so you use the reference angle to extend the lines through the quadrants and then use the formulas..

OpenStudy (dumbcow):

yeah kinda, ignore the formulas....let me change diagram

OpenStudy (dumbcow):

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