MathGroup Archive: November 2007 [00461]

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Re: Choosing preferred functions for Trig Simplification?

To: mathgroup at smc.vnet.net
Subject: [mg83292] Re: Choosing preferred functions for Trig Simplification?
From: Szabolcs Horvát <szhorvat at gmail.com>
Date: Sat, 17 Nov 2007 05:13:18 -0500 (EST)
References: <fhegov$m8b$1@smc.vnet.net> <fhh79i$8l2$1@smc.vnet.net>

AES wrote:
> 
>       n1 Csc[ theta2 ]  =  n2 Csc[ theta1 ]
> 
> instead of  
> 
>       n1 Sin[ theta1 ] = n2 Sin[ theta2 ]
> 

According to
<http://enterprise.maa.org/scripts/WA.EXE?A2=ind9712&L=math-history-list&T=0&F=&S=&P=19830>,
Snellius had originally used the cosecant form. ;-)

Szabolcs

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