Description: | Produces the cosine of X. | ||

Class: | Elemental function; Generic | ||

Arguments: |
X must be of type real or complex. It must be in radians and is treated as modulo 2*pi. (If X is of type complex, its real part is regarded as a value in radians.) | ||

Results: | The result type is the same as X. |

Specific Name | Argument Type | Result Type |
---|---|---|

COS | REAL(4) | REAL(4) |

DCOS | REAL(8) | REAL(8) |

QCOS | REAL(16) | REAL(16) |

CCOS ^{1} |
COMPLEX(4) | COMPLEX(4) |

CDCOS ^{2} |
COMPLEX(8) | COMPLEX(8) |

CQCOS | COMPLEX(16) | COMPLEX(16) |

^{1} The setting of compiler options specifying
real size can affect CCOS.
^{2} This function can also be specified
as ZCOS. |

**Examples**

COS (2.0) has the value -0.4161468.

COS (0.567745) has the value 0.8431157.

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