Respostas

  • Usuário do Brainly
2014-07-21T15:57:45-03:00
Cos 4.90  +2.tg 90 /2 - sen 2.90   /   cotg 90 .cosec 90 + sen 8 .90 

cos 360 + 2.tg 45 - sen 180 / cotg 90 .cossec 90  -sen 720

1 + 2.1 -1  /  0.1 - 0  =  2 / 0   =0
2 3 2