clear
//ch-1, problems on obstacles in chaining, page-32,pb-1

//

//

printf("\n from fig p.1.1')
DE=87
printf("\n DE")
EF=(87/(cos(50*(%pi/180))))

DF=87*(tan(50*(%pi/180)))

EG=87/(cos(65*(%pi/180)))


printf("\n  the value of EF is  %0.3f meters',EF)

printf("\n  the value of DF is  %0.3f meters',DF)

printf("\n  the value of EG is  %0.3f meters',EG)