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

Eddie


All original content copyright, © 2011-2022.  Edward Shore.   Unauthorized use and/or unauthorized distribution for commercial purposes without express and written permission from the author is strictly prohibited.  This blog entry may be distributed for noncommercial purposes, provided that full credit is given to the author. 


Casio fx-CG50: Sparse Matrix Builder

Casio fx-CG50: Sparse Matrix Builder Introduction The programs can create a sparse matrix, a matrix where most of the entries have zero valu...