initial commit / add all books

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diff --git a/2915/CH5/EX5.7/Ex5_7.sce b/2915/CH5/EX5.7/Ex5_7.sce
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+//Example 5.7

+//To find amplitude and period of given composite function 

+clear,clc;

+

+x = linspace(0,3,200);

+y1=2 ;//1st part of given function

+amplitude1=y1 ;//amplitude numerically same for constant function

+y2= -3*sin((2*%pi/3)*x); //second part of given function

+amplitude2 = abs(y2/sin((2*%pi/3)*x)) ;//amplitude of part 2

+//Note: adding 2 doesnt change ampitude

+//It just causes the upward shift of graph

+maax =amplitude1 + amplitude2; //altered maximum due to adding of 2

+minn =amplitude1 - amplitude2;//altered minimum due to adding of 2

+amplitude = (maax-minn)/2;//required amplitude

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

+ 

+multiple=2*%pi/3 ;//multiplicity of angle

+period_sinx=2*%pi;//period of sin_x

+period_required = period_sinx/ multiple;

+printf('\nRequired period is %f radians',period_required);

+

+x = linspace(0,3,200);

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

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

+plot(x,y);

+xlabel("$0\le x\le 3$","fontsize",4,"color","red");

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

+title("Example 5.7","color","blue","fontsize",9);

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