megengine.functional.cos¶
- cos(x)[source]¶
Element-wise \(\cos(x)\) function.
Calculates an approximation to the cosine for each element \(x_i\) of the input tensor \(x\). Each element \(x_i\) is assumed to be expressed in radians.
This function has domain
(-infinity, +infinity)and codomain[-1, +1].- Parameters
x – input tensor whose elements are each expressed in radians. Should have a floating-point data type.
- Returns
a tensor containing the cosine of each element in \(x\). The returned tensor must have a floating-point data type determined by Type promotion rules.
Examples
>>> F.cos(0) Tensor(1.0, device=xpux:0)
Element-wise cosine:
>>> import math >>> x = Tensor([0, math.pi/2, math.pi]) >>> F.cos(x) Tensor([ 1. -0. -1.], device=xpux:0)