hello all! how do you know for sure which quadrant "they" want you to have your measure in?(adsbygoogle = window.adsbygoogle || []).push({});

for example:

Write each equation in normal form. Then findp,the measure of its normal, and "phi" the angle the normal makes with the positive x-axis.

21.-10x+5=-5y

i've got all the other stuff, it's just that when it comes to the angle measure of "phi," i get sonfused. I don't know how to recognize in which quadrant it should be. for this, I thought that it was this measure:

-26.57..........but the correct answer was 333 degrees, approximately.

i know that they got this by adding 360 to -26 degrees, butI don't know.WHY

thanks in advance for any help

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# Homework Help: How do you know for sure what quadrant?

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