initial commit / add all books

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diff --git a/14/CH14/EX14.6/example_14_6.sce b/14/CH14/EX14.6/example_14_6.sce
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+//Chapter 14
+//Example 14.6
+//Page 392
+//frequency
+clear;clc;
+delta = 28.44;
+H = 5;
+ws = 377;
+Pm =1;
+Vt = 1;V_ib = 1;
+X1_g =0.2;X1_t = 0.1;X1_l1 = 0.4;X1_l2 = 0.4;
+X = X1_t + X1_l1 /2;
+a = asin(Pm * X / (Vt * V_ib)) * 180 / %pi;
+Vt1 = Vt * (cos(a * %pi / 180) + %i * sin(a * %pi / 180));
+I = (Vt1 - V_ib) / (%i * X);
+E1 = Vt1 + (%i * X1_g * I);
+X1 = X1_g + X1_t + X1_l1 /2;
+Pmax = abs(E1) * V_ib / X1;
+Sp = Pmax * cos(delta * %pi / 180);
+wn = sqrt(ws * Sp / (2 * H));
+fn = wn / (2 * %pi);
+T = 1 / fn;
+printf("\n The angular frequency of oscillation is %.3f elec rad/s \n",wn)
+printf("\n The corresponding frquency of oscillation is %.2f Hz \n",fn)
+printf("\n The period of oscillation is %.3f s",T)
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diff --git a/14/CH14/EX14.6/result_ex_14_6.txt b/14/CH14/EX14.6/result_ex_14_6.txt
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+ The angular frequency of oscillation is 8.343 elec rad/s 
+
+ The corresponding frquency of oscillation is 1.33 Hz 
+
+ The period of oscillation is 0.753 s