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Re: Choosing preferred functions for Trig Simplification?


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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