initial commit / add all books

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diff --git a/2915/CH5/EX5.12/5_12.JPG b/2915/CH5/EX5.12/5_12.JPG
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diff --git a/2915/CH5/EX5.12/Ex5_12.sce b/2915/CH5/EX5.12/Ex5_12.sce
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+//Example 5.12

+//To find the amplitude phase shift and period of given function

+clear,clc;

+

+x = linspace(-%pi/6,4*%pi/3,200);

+deviation = -%pi/2;//deviation from multiples of x

+y = -2*sin(3*x- deviation) ;// given function

+amplitude = abs(y/(sin(3*x- deviation)) );

+printf('Amplitude = %f\n',amplitude);

+multiple = 3; //multiplicity of angle 

+period_sinx = 2*%pi ;//period of sin(x) in radians

+required_period = period_sinx / multiple;

+printf('Required period = %f radians\n',required_period);

+phase_shift = deviation / multiple;

+printf('Phase shift = %f radians',phase_shift);

+

+x = linspace(-%pi/6,4*%pi/3,200);

+y =-2*sin(3*x+ %pi/2) ;

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

+plot(x,y);

+ylabel("$y =-2*sin(3*x+ %pi/2)$","fontsize",4,"color","red");

+title("Example 5.12","color","blue","fontsize",9);

diff --git a/2915/CH5/EX5.12/plot5_12.jpeg b/2915/CH5/EX5.12/plot5_12.jpeg
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