- #1

JR Sauerland

Gold Member

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I get the dynamics of what the question is asking. What I don't get is how to know what pi/8 is. What I've been doing this entire time is plugging it into the calculator as a fraction, and getting the decimal value of it and comparing it to other values I know.

I know that pi radians = 180 degrees, if you divide both sides by two, pi/2 radians = 90 degrees. Then, I know that if I divide pi by 2 in a calculator and get the decimal value and compare it to the decimal value of pi/8, I know if it falls within the first quadrant or not.

But is there an easier or simpler way to do this? Again, I'm just focusing on pi over 8, and how they know precisely where it falls.