{"text_format":"3","workbook":"xlsx","n_sheets":1,"sheets":["Sheet1"],"read":"whole","date_system":"1900"}

{"sheet":"Sheet1","index":0,"n_rows":12,"n_cols":4,"rows_kept":12}
["angle","COS",null,"Formula Text"]
[{"$f":"-PI()/2","v":-1.5707963267948966},{"$f":"COS(A2)","v":6.1257422745431e-17},null,{"$f":"_xlfn.FORMULATEXT($B2)","v":"=COS(A2)"}]
[-0.5,{"$f":"COS(A3)","v":0.8775825618903728},null,{"$f":"_xlfn.FORMULATEXT($B3)","v":"=COS(A3)"}]
[0,{"$f":"COS(A4)","v":1},null,"=COS(A4)"]
[0.5,{"$f":"COS(A5)","v":0.8775825618903728},null,"=COS(A5)"]
[{"$f":"PI()/2","v":1.5707963267948966},{"$f":"COS(A6)","v":6.1257422745431e-17},null,"=COS(A6)"]
[null,{"$f":"COS(10*PI()/180)","v":0.984807753012208},null,"=COS(10*PI()/180)"]
[]
["Formula","Formula Text",null,"Comments"]
[{"$f":"COS(SQRT(-1))","v":{"$error":"#NUM!"}},{"$f":"_xlfn.FORMULATEXT($A10)","v":"=COS(SQRT(-1))"},null,"Example of error propagation."]
[{"$f":"COS(\"str\")","v":{"$error":"#VALUE!"}},{"$f":"_xlfn.FORMULATEXT($A11)","v":"=COS(\"str\")"},null,"Unable to convert angle argument to a number."]
[{"$f":"COS(10/0)","v":{"$error":"#DIV/0!"}},"=COS(10/0)",null,"Input causes a #DIV/0! error."]