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DSK wrote:
Now that I have my referance library and a spreadsheet instead of a pocket calculator and faulty memory, I'll try again. It's a more interesting problem than I thought it'd be.... Yup, the south pole behaves differently - gonna to play with that later. No, it increases. And the change isn't linear. Yes, I realized this thinking about it on the drive home. So what is it proportional to, the arcsine? The function I used is: cos(lat) x 60 Since the cosine produces the same curve as a sine, but 90deg out of phase [it starts high instead of low - cos(0)=1, sin(0)=0], for the first 0-90deg, we're seeing the second half of the bendy top of the curve, followed by the first half of the straightish negative-going part of the curve. The most linear part starts at about 50-60 degrees and continues to the pole. -- Wally www.artbywally.com www.wally.myby.co.uk |
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