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// ch-1 page-36,37 pb-7
//
//
BE=50
AB=25
AEC=157.5-67.5
al=atan(BE/AB)
al=al*(180/%pi)
printf("\n al %0.3f ",al)
bt=90-al
printf("\n bt= %0.3f ",bt)
k=(tan(bt*%pi/180))
printf("\n k= %0.3f ",k)
BC=BE/k
C=275.5+BC
printf("\n chinage of c is %0.3f meters',C)
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