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clear
//
//variable declaration
//summation of all horizontal forces is zero & vertical forces is zero.
P1=(10) //Vertical down Load at 4m from A,KN
P2=(15) //Inclined down Load at angle 30° at 6m from A,KN
P3=(20) //Inclined down Load at angle 45° at 10m from A,KN
theta2=30
theta3=45
//horizontal,vertical component at A is Ha,Va respectively.
Ha=P2*cos(theta2*%pi/180)+P3*cos(theta3*%pi/180)
Rb=(P1*4+P2*6*sin(theta2*%pi/180)+P3*10*sin(theta3*%pi/180))/12 //reaction at B point,KN
printf("\n RB= %0.4f KN",Rb)
//now vertical component
Va=P2*sin(theta2*%pi/180)+P3*sin(theta3*%pi/180)+P1-Rb
Ra=sqrt((Ha**2)+(Va**2))
printf("\n RA= %0.4f KN",Ra)
alpha=(atan(Va/Ha))*180/%pi
printf("\n alpha= %0.2f °",alpha)
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