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Portable Network Graphic  |  1998-07-22  |  1.9 KB  |  237x130  |  1-bit (2 colors)
   ocr: Even-Oddidentities - sin(-x)=-sin. I csc(-x)=-csc. A cos(-x)=cos - X sec(-x)= - sec - X tan(-x)--tan: X - cot(-x)=- - - cot X