Description: Closure of the sine function. (Contributed by NM, 28-Apr-2005) (Revised by Mario Carneiro, 30-Apr-2014)
Ref | Expression | ||
---|---|---|---|
Assertion | sincl | ⊢ ( 𝐴 ∈ ℂ → ( sin ‘ 𝐴 ) ∈ ℂ ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sinf | ⊢ sin : ℂ ⟶ ℂ | |
2 | 1 | ffvelrni | ⊢ ( 𝐴 ∈ ℂ → ( sin ‘ 𝐴 ) ∈ ℂ ) |