Arctan operation gives result as arcsin

[jcruzcode]

For example,

arctan(2) displays as arcsin(2) which is not equal

https://newton.now.sh/api/v2/arctan/2 {operation: 'arctan', expression: '2', result: 'arcsin(2)'} expression: '2' operation: 'arctan' result: 'arcsin(2)' [[Prototype]]: Object