user: Question: If the coordinate velocity v dx/dt in units of c is (e 2 − 1)/(e 2 + 1) ≅ 0.761, what is the velocity angle η in i-radians?
Columns: ['Condition/Parameter', 'Coordinate velocity v dx/dt in units of c', 'Velocity angle η in i-radians', 'Proper velocity w dx/dτ in units of c', 'Lorentz factor γ dt/dτ = E/mc 2']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Momentum = ½mc ⇔ 0.5 map-lightyear/traveler-year', '1/√5 ≅ 0.447', 'ln[(1 + √5)/2] ≅ 0.481', '½', '√5/2 ≅ 1.118']
SQL:

assistant: SELECT "Velocity angle η in i-radians" FROM "Table" WHERE "Coordinate velocity v dx/dt in units of c" = '(e 2 − 1)/(e 2 + 1) ≅ 0.761';