atan

atan(x: array, /) → array

Calculates an implementation-dependent approximation of the principal value of the inverse tangent, having domain [-infinity, +infinity] and codomain [-π/2, +π/2], for each element x_i of the input array x. Each element-wise result is expressed in radians.

Special cases

For floating-point operands,

  • If x_i is NaN, the result is NaN.

  • If x_i is +0, the result is +0.

  • If x_i is -0, the result is -0.

  • If x_i is +infinity, the result is an implementation-dependent approximation to +π/2.

  • If x_i is -infinity, the result is an implementation-dependent approximation to -π/2.

Parameters:

x (array) – input array. Should have a floating-point data type.

Returns:

out (array) – an array containing the inverse tangent of each element in x. The returned array must have a floating-point data type determined by Type Promotion Rules.