+-------------------------------IBM Extension--------------------------------+

Arccosine (inverse cosine) function. Result in degrees.

**X**- must be of type real. Its value must satisfy the inequality |X| <= 1.

**Class**

Elemental function

**Result Type and Attributes**

Same as X.

**Result Value**

- It is expressed in degrees and approximates arccos(X).
- It is in the range 0° <= ACOSD(X) <= 180°.

**Examples**

ACOSD (0.5) has the value 60.0.

Specific Name | Argument Type | Result Type | Pass As Arg? |
---|---|---|---|

ACOSD | default real | default real | yes |

DACOSD | double precision real | double precision real | yes |

QACOSD | REAL(16) | REAL(16) | yes |

+----------------------------End of IBM Extension----------------------------+