COS Function

Calculates the cosine of the input variable.

result = COS(x)

x The angle for which the cosine is desired, specified in radians.

result The trigonometric cosine of x.

None.

If x is of double-precision floating-point or complex data type, COS yields a result of the same type. All other types yield a single-precision floating-point result.

COS handles complex numbers in the following manner:

cos(x) = complex(cos(i)cosh(r), -sin(r)sinh(-i))

where r and i are the real and imaginary parts of x. If x is an array, the result of COS has the same dimensions (size and shape) as x, with each element containing the cosine of the corresponding element of x.

x = [-60, -30, 0, 30, 60]
PRINT, COS(x * !Dtor)

0.500000 0.866025 1.00000 0.866025   0.500000

ACOS, ASIN, ATAN, COSH, COSINES, SIN, TAN

For a list of other transcendental functions, see Transcendental Mathematical Functions in Chapter 1.