Question

Se s = sen(x), 5s² + s - 4 = 0 e 0 < x < π/2 então:

a) π/4 < x < π/2
b) x=π/2
c) x=0
d) 0< x < π/6
e) 0< x < π/4

Answer 1

Resposta:

a) π/4 < x < π/2

espero ter ajudado