Respostas

2013-06-19T20:42:23-03:00

pi = 180

360/3 = 120

 

cotangente de 120

 

cotg120 = sen120/cos120

cotg120 = sen (180 - 120)/cos (180 - 120)

cotg120 = sen60/cos60

cotg120 = (√3/2)/(1/2)

cotg120 = √3/2 . 2/1

cotg120 = 2.√3/2.1

 

cotg120 = √3

2 4 2