Respostas

2013-07-02T22:54:31-03:00

A)  y= cossec 11°= 1/(sen 11°) = 1/(0,190808)=5,2408

 

B) /6 + sec 4pi/3 = 1/(sen 330°) + 6/(cos 240°)+1/(cos 240°) = -2+6/(-0,5)+1/(-0,5) = -16