Relationship between sin and sinh
From specialfunctionswiki
Theorem: The following formula holds: $$\sin(x)=-i \sinh(ix),$$ where $\sin$ denotes the sine and $\sinh$ denotes the hyperbolic sine.
Proof: █
Theorem: The following formula holds: $$\sin(x)=-i \sinh(ix),$$ where $\sin$ denotes the sine and $\sinh$ denotes the hyperbolic sine.
Proof: █
