A man on the fifth floor of a building shouts down to a person on the street. If the angle of elevation from the street to the man in the building is 35° and the man in the building is 40 feet up, about how far away from the building is the person on the street?
13. If A =600 , B=450 and C=300, Prove that
tan2A + 4cos2B +3 sec3C=9 where, 600 is 60 degree,450 is 45 deg 300 is 30 deg and tan 2 is tan square cos2 and sec 3 is all square and cube