Returns a value that is the cosine of the specified angle expressed in radians.
COS(X)
x is a floating-point value.
COS(0.0) /* returns 1.0 */
A COS operation on floating-point decimal data is actually performed using the floating-point binary operation. Thus, the range of the operands and the result of the operation are limited to the ranges for floating-point binary numbers.
Description
The COS function returns a value that is the cosine of the angle x expressed in radians. The result has the same data type as x such that -1 ≤ COS(x) ≤ 1.