® The domains and ranges (principal value branches) of inverse trigonometric

® The domains and ranges (principal value branches) of inverse trigonometric functions are given in the following table: Functions Domain Range (Principal Value Branches) y = sin – x [– , ] y = cos – x [– , ] [ , π ] y = cosec – x R – (– , ) – { } y = sec – x R – (– , ) [ , π ] – { } y = tan – x R y = cot – x R ( , π ) ® sin – x should not be confused with (sin x ) – . In fact (sin x ) – = sin x and similarly for other trigonometric functions.