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Re: Quicker Ex-Meridian Formula for Slide Rule or Calculator
From: John Brown
Date: 2016 Dec 6, 01:08 -0800

cos²θ + sin²θ = 1, or
sin θ = sqrt(1 - cos²θ), or
cos θ = sqrt(1 - sin²θ)

Frank, thanks for dusting that one off for me.

Regards

John

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