NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Frank Reed
Date: 2013 Dec 31, 10:26 -0800
Here's a road sign from Google Street View imagery in southern Texas. According to someone who posted a similar image on flickr, this is the steepest incline on I-10, which runs across the southern US from Florida to California.
What is the angular inclination of this downhill slope in degrees (to the nearest tenth)? No calculator and no trig allowed. You can do it in your head with that magic number, 3438. Again: angles ARE ratios. We only quote them in degrees and minutes for historical continuity.
After you've done the calculation in your head, consider the possible trig solutions. Are they any better?
-FER
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