Okay.. I apologize for my inability to use the fancy math graphics. I'm going to finally put some time into learning that soon.

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Solve: 2 sec^2 (-)/2 + 3 sec (-)/2 - 2 = 0

provided 0 deg < (-) < 360 deg

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I've already tried a couple (most likely completely wrong) approaches... If someone could just walk me through this, I'd really appreciate it.