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Im just wondering how do u know which quadrant this point is in? I have assumed it is in quadrant 1. Then that means x=-3, y=-4, and r=5?

When determining values for trig functions for example lets say

[tex] \sin= \frac {opposite} {hypotenuse} = \frac {-4} {5} [/tex] is this the value they want me to determine or do I have to put it in decimals?