sin(x, out=None, **kwargs)

Trigonometric sine, element-wise.

  • x (ndarray or scalar) – Angle, in radians (\(2 \pi\) rad equals 360 degrees).

  • out (ndarray or None) – A location into which the result is stored. If provided, it must have a shape that the inputs broadcast to. If not provided or None, a freshly-allocated array is returned. The dtype of the output is the same as that of the input if the input is an ndarray.


y – The sine of each element of x. This is a scalar if x is a scalar.

Return type

ndarray or scalar


This function only supports input type of float.


>>> np.sin(np.pi/2.)
>>> np.sin(np.array((0., 30., 45., 60., 90.)) * np.pi / 180.)
array([0.        , 0.5       , 0.70710677, 0.86602545, 1.        ])