This rule only For Mathematician design solution I J function. This ruls is for caculate the relation between I - J function and some trigonometric functions and hyperbolic functions is given. It is convenient to solve the roots of three and four polynomial equations by using trigonometric functions and library programs of hyperbolic functions.

Still in the plactic bag. Designed by the famous Chinese mathematician and physics DR LU.There is no other information about this rule, a variety of scales, please see the pictures. The item "Rare Scale Mathematician Solution I J function Flying fish shanghai slide rule" is in sale since Friday, July 07, 2017.

This item is in the category "Collectibles\Science & Medicine (1930-Now)\Engineering\Slide Rules". The seller is "xmuking" and is located in shanghai. This item can be shipped to North, South, or Latin America, all countries in Europe, all countries in continental Asia, Australia.

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