arc cosine

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#13

From: Jim McCarthy
Date: Mon, 15 Feb 1999 00:00

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I am writing a program to calculate the distance between two lat. and
long. points.

The only thing I am missing is how to calculate arc cosine.

I know the arc cosine of 0.998248285 = 0.059198418. but what is the
formula for calculating this?

Any help you can supply would be much appreciated.

Thanks
Jim

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From: "Jim McCarthy" <jamesmc@primenet.com>
Subject: arc cosine
Date: 1999/02/15
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