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diff --git a/1574/CH1/EX1.3/Signals_Ex_1_3.sce b/1574/CH1/EX1.3/Signals_Ex_1_3.sce
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+clc

+//Chapter1: Signals

+//Example2,page no12

+//Given:

+//a  // Referance Figure on page no 9.. (1.6d)

+t=0:2*3.14,t0=0,t1=2*3.14

+disp('a) The value of constants Cn are:')

+for i=1:7

+    C(i)=((integrate('sin(i*t)','t',t0,t1/2)-integrate('sin(i*t)','t',t1/2,t1))/integrate('(sin(i*t))^2','t',t0,t1))

+    if C(i)<=0.01 then C(i)=0

+    end

+    mprintf('%f    for n= %d\n',C(i),i)

+end

+//b Mean Square error

+

+int1=integrate('(1)^2','t',t0,t1)

+for n=1:7

+    if modulo(n,2)==0 then

+        C(n)=0

+    else

+    C(n)=4/(n*%pi)

+end

+end

+for n=1:7

+ 

+    K(n)=integrate('(sin(n*t))^2','t',t0,t1)

+ 

+end

+K(n)=%pi

+

+for n=1:7

+S(1)=0 

+    S(n+1)=S(n)+(((C(n))^2)*K(n))

+ 

+end

+//Mean Square error

+for n=1:7

+    epsi(n)=(1/(t1-t0)*(int1-S(n+1)))

+end

+disp('b) Mean Square error is')

+for n=1:2:7

+mprintf('epsi(%d)=%f\n',n,round(100*epsi(n))/100)

+

+end

+

+