Compute hyperbolic tangent element-wise.
Equivalent to np.sinh(x)/np.cosh(x) or -1j * np.tan(1j*x).
If out is provided, the function writes the result into it, and returns a reference to out. (See Examples)
>>> np.tanh((0, np.pi*1j, np.pi*1j/2)) array([ 0. +0.00000000e+00j, 0. -1.22460635e-16j, 0. +1.63317787e+16j])
>>> # Example of ValueError due to provision of shape mis-matched `out` >>> np.tanh(np.zeros((3,3)),np.zeros((2,2))) Traceback (most recent call last): File "<stdin>", line 1, in <module> ValueError: invalid return array shape
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