polars.Expr.tan

Expr.tan() → Expr

Compute the element-wise value for the tangent.

Returns:

Expr

Expression of data type Float64.

Notes

The argument must be in radians. To convert from degrees to radians, call .radians().

Examples

>>> from math import pi
>>> df = pl.DataFrame({"a": [0.0, pi / 4]})
>>> df.select(pl.col("a").tan())
shape: (2, 1)
┌─────┐
│ a   │
│ --- │
│ f64 │
╞═════╡
│ 0.0 │
│ 1.0 │
└─────┘
>>> df = pl.DataFrame({"a": [0.0, 45]})
>>> df.select(pl.col("a").radians().tan())
shape: (2, 1)
┌─────┐
│ a   │
│ --- │
│ f64 │
╞═════╡
│ 0.0 │
│ 1.0 │
└─────┘