## 9.3.27 COS (X)

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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