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Re: Research of a Free EXTENDED PRECISION Calculator Software toconvert radians into degrees
From: Paul Hirose
Date: 2015 Apr 29, 10:06 -0700

Kermit, you already have an extended precision calculator. The Windows scientific calculator has 32 significant digits. I think this is not true of the default simple calculator. You must click View and select the scientific calculator. For example, here's what it gives for e^1 2.7182818284590452353602874713527 In Windows 8.1 the calculator has a unit conversion function, but that seems to work in double (not extended) precision. When I convert 57 degrees to radians, it says 0.9948376736367678, which is "only" 16 digits. I copied that and pasted it into the calculator (you can copy from the calculator and paste into it), divided by pi, multiplied by 180, and got 56.999999999999996628343696709571. So I guess you have to do the radian conversions via pi and 180 for full accuracy.

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