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//Force P required to hold the system
//Refer to fig. 2.28 (a),(b)&(c)
//Applying Lami's Theorem at A we get
C=4000*sind(180-60)/sind(60+90-15) //N
//Applying equilibrium conditions B
P=(-2000*cosd(45)+C*cosd(60))/cosd(15) //N
printf("P=%.1f N is required to hold the system in given position.",P)
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