polars.Expr.cos

Expr.cos() → Self

Compute the element-wise value for the cosine.

Returns:

Expr

Expression of data type Float64.

Examples

>>> df = pl.DataFrame({"a": [0.0]})
>>> df.select(pl.col("a").cos())
shape: (1, 1)
┌─────┐
│ a   │
│ --- │
│ f64 │
╞═════╡
│ 1.0 │
└─────┘