Monday, January 31, 2022

Eugene Dietzgen: Compound Trig-Easy Calculator

 Eugene Dietzgen: Compound Trig-Easy Calculator

I purchased this cool, vintage formula card on Esty from the Lost Angeles Vintage Co. in Wofford Heights, California.  

The Compound Trig-Easy calculator is a 1943 formula reference card for calculating angels and lengths (dimension) of right triangle pyramids and rectangular pyramids.  Following are some example calculations.   

sec E = tan C * cot B

H = D * csc C * csc E

tan D = sin J * csc S

cos R = cos G * sec S


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