Question

(sec²0 - 4/3) (2sin0 + 1)=0

csc³0 + 2csc²0 - 4/3csc²0 - 8/3=0

2sin²0 + 2sin0 + 1/2 =0

Answer 1

2sin²0 + 2sin0 - 1/2 = 0

(2sin0 + 1)(sin²0 - 1/2)= 0

2sin0 + 1 = 0 or sin²0 - 1/2 = 0

2sin0 = -1 or sin0 = ±1/√2