Interface

      F_TYPE tan (F_TYPE x)

      F_TYPE tand (F_TYPE x)

1  –  Description

    tan() computes the tangent of x, measured in radians.

    tand() computes the tangent of x, measured in degrees.

                           Entry-Point Names

    Generic
    Function   Data Type   OpenVMS        Tru64 UNIX
    Name       Required

    tan        S_FLOAT     math$tan_s     tanf
               T_FLOAT     math$tan_t     tan
               X_FLOAT     math$tan_x     tanl
               F_FLOAT     math$tan_f
               G_FLOAT     math$tan_g

    tand       S_FLOAT     math$tand_s    tandf
               T_FLOAT     math$tand_t    tand
               X_FLOAT     math$tand_x    tandl
               F_FLOAT     math$tand_f
               G_FLOAT     math$tand_g

2  –  Exceptions

    Exceptional Argument                  Routine Behavior

    |x| = infinity                        Invalid argument
    (tand) |x| < (180/pi) * min_float     Underflow
    (tand) x = (2n+1) * 90                Overflow

    Data
    Type  Value for: (180/pi) * min_float

    F     Hexadecimal: 2EE10365
    G     Hexadecimal: C1F81A63A5DC006C
    S     Hexadecimal: 00000039
    T     Hexadecimal: 0000000000000039
    X     Hexadecimal: 00000000000000000000000000000039

    F     Decimal: 1.683772e-37
    G     Decimal: 3.187183529933798e-307
    S     Decimal: 8.028849e-44
    T     Decimal: 2.830787630910868e-322
    X     Decimal: 3.71000205951917569316937757202433432154392e-4964