Solving: secx=-5.2, 0≤x≤2π: Why Only 1 Answer?

[Destrio]

Solve: secx=-5.2, 0≤x≤2π

I'm getting 2 answers:
1.76, 4.52

The answer key is telling me there is only one
1.76

How do I only get 1 answer from this?

Thanks,

 

[Destrio]

damn, wrong forum
sorry, I'll repost