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+// Ex 6 Page 346
+
+clc;clear;close;
+// Given
+
+Ro=600;//ohm
+fc=2*1000;//Hz
+alfa=10;//dB
+
+
+L=Ro/%pi/fc*1000;//mH
+C=1/(%pi*Ro*fc)*10**6;//uF
+alfa=alfa/8.686;//nepers
+f=fc*cosh(alfa/2)/1000;//kHz
+printf("\nat f = %.2f kHz, the above filter will have required attenuation.",f)