Numpy 1.11
Numpy 1.11
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numpy.cosh()

numpy.cosh

numpy.cosh(x[, out]) =

Hyperbolic cosine, element-wise.

Equivalent to 1/2 * (np.exp(x) + np.exp(-x)) and np.cos(1j*x).

Parameters:

x : array_like

Input array.
Returns:

out : ndarray

Output array of same shape as x.

Examples

>>> np.cosh(0)
1.0

The hyperbolic cosine describes the shape of a hanging cable:

>>> import matplotlib.pypl