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#1
07-23-2012, 03:54 AM
 Unregistered Guest Posts: n/a
percent to degrees

As I hiker I sometimes want to calculate the difficulty of a climb. I know how to use rise over run to get the percent of an incline. How do I convert that percent to degrees WITHOUT a scientific calculator? For example, yesterday I went up a trail with a 38 percent incline (1000 ft. gain over 1/2 mile).
#2
07-23-2012, 04:12 AM
 JohnS Moderator Join Date: Dec 2007 Location: SE Michigan, USA Posts: 9,546 Rep Power: 19
Re: percent to degrees

Quote:
 Originally Posted by Unregistered As I hiker I sometimes want to calculate the difficulty of a climb. I know how to use rise over run to get the percent of an incline. How do I convert that percent to degrees WITHOUT a scientific calculator? For example, yesterday I went up a trail with a 38 percent incline (1000 ft. gain over 1/2 mile).
You either need a scientific calculator (Windows has one hiding in the Windows apps, and there are many Javascript ones on the web) or a trig table. You need the arc whose tangent is 0.38. The inverse function is called arctangent, abbreviated ATAN, ATN or TAN with -1 superscript.
The answer is 20.8°
#3
07-31-2012, 04:35 PM
 luijibowen Junior Member Join Date: Jul 2012 Posts: 4 Rep Power: 0
Re: percent to degrees

It depends if you're a brilliant person which can easily give the answer directly

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