Respostas

2014-07-06T18:00:37-03:00
2014-07-07T05:49:55-03:00
A) E =  \frac{cos 120 + sen 330}{cos 180}  = 1

B) E =  \frac{cos 810 + cos 900}{sen 630 + sen 1080}  = 1

C) E =  cos 1500 + \frac{37π}{6} + cos \frac{19π}{3} = 20,81

D) E =  \frac{cos 1380 + sen 1260}{sen 765 + cos 3π} = 0,3
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