Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_19991 ( "Condition/Parameter" text, "Coordinate velocity v dx/dt in units of c" text, "Velocity angle \u03b7 in i-radians" text, "Proper velocity w dx/d\u03c4 in units of c" text, "Lorentz factor \u03b3 dt/d\u03c4 = E/mc 2" text )

### 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 in i-radians?

### Accurate SQL ###

SELECT "Velocity angle \u03b7 in i-radians" FROM table_19991 WHERE "Coordinate velocity v dx/dt in units of c" = '(e 2 − 1)/(e 2 + 1) ≅ 0.761'