polars.Expr.cos#

Expr.cos() Expr[source]#

Compute the element-wise value for the cosine.

Returns:
Series of dtype Float64

Examples

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