Respuesta :

Hello.

We just need to simplify each expression given!

1. cot(π) = undefined
2. csc(5π/4) = -√2
3. sec(-65°) = 2.366201..
4. csc(340°) = -2.92380
5. sec(120°) = -2

Therefore, choice 2, 4 and 5 have negative values.