# Which Quadrant?

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• Oct 20th 2009, 01:56 PM
tsmith
Which Quadrant?
Which quadrant do the following angles lie in:
1. (5pie) / (4)
2. (7pie) / (4)

I think it has something to do with whether the angle is between 0 and pie/2 or between pie/2 and pie, but I'm not sure how to classify them.
• Oct 20th 2009, 02:02 PM
pickslides
$\frac{5\pi}{4} = \pi+\frac{\pi}{4} \Rightarrow$ 3rd

$\frac{7\pi}{4} = 2\pi-\frac{\pi}{4} \Rightarrow$ 4th