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Nomograms for Multiplication and Division
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a+b+c addition and subtraction algebraic alternative nomogram angle arrow-feathers axes axis centimetres Chapter Circular Nomogram coefficients collinear points Construct a nomogram construct the nomogram convenient cubic equation cut the parabola cuts the scales Deflexion diagram equation x2+ax+b=0 feet full unit give given in Fig given ranges graduation x gram half unit Hence hyperbola inches intersection interval join cuts join the point line joining line of zeros line y=ax+b log graduation logarithmic scale midway multiplication and division negative nomo nomogram for addition nomogram is given nomogram of Fig nomograms with perpendicular nomography obtained optical formula parallel coordinates perpendicular scales plot positive preliminary nomogram quadratic equation quantities ratic ratio reference line revolutions per minute segmentary scale simultaneous equations slide rule solve the equations subdivisions take scale take the point Take three parallel three collinear graduations values x curve x unit x=a+b X=AB x=la+mb