given that 0≤β<2π, which of the following gives all solutions to the equation 2sin2β=9sinβ−4?
Select the correct answer below:
a. β = phi/6
b. β = phi/3
c. β = phi/6 ; 5phi/6
d. β = phi/3 ; 5phi/3
e. β = 7phi/6 ; 11phi/6