Question

(Cesgranrio-RJ) Se 0< a < pi/2, pi/2 < b < pi e sen a= sen b = 3/5, então a+b vale:?

a) pi
b) 3pi/2
c) 5pi/4
d) 4pi/3
e) 6pi/5

Answer 1

sen a= 3/5
3/5 = 36,87°
sen b= 3/5
3/5 = 143.13°
a + b = 180°
= π
letra a