initial commit / add all books

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diff --git a/2915/CH8/EX8.1/Ex8_1.sce b/2915/CH8/EX8.1/Ex8_1.sce
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+//Example 8.1

+//To plot the function of sin(x)

+clear,clc;

+

+x = linspace(-0,2*%pi,50);

+y = sin(x) ;

+

+//For grid, uncomment below line

+//set(gca(),"grid",[5 5]);

+

+printf('NOTE:\nTo enable the grid , check the code')

+plot(x,y,'r');

+xlabel("$0\le x\le 2*pi$","fontsize",4,"color","red");

+ylabel("$y(x)=sin(x)$","fontsize",4,"color","red");

+title("Example 8.1","color","blue","fontsize",9);

+legend("sin(x)");

diff --git a/2915/CH8/EX8.1/plot8_1.jpeg b/2915/CH8/EX8.1/plot8_1.jpeg
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