The notation "f" −1 is sometimes also used for the inverse function of the function "f", which is not in general equal to the multiplicative inverse. For example, the multiplicative inverse is the cosecant of x, and not the inverse sine of "x" denoted by or . Only for linear maps are they strongly related (see below). The terminology difference "reciprocal" versus "inverse" is not sufficient to make this distinction, since many authors prefer the opposite naming convention, probably for historical reasons (for example in French, the inverse function is preferably called bijection réciproque).