Function reference · Trigonometry

`acos`

Computes the principal arccosine in radians.

Known real inputs are reduced to exact multiples of pi. Numeric inputs outside the real interval [-1,1] can produce complex principal values.

Examples

These examples use Nerdamer Notation.

Evaluate an endpoint of the real domain.

acos(1)
// → 0

Use an exact inverse-trig value.

acos(1/2)
// → (1/3)*pi

The same operation is available through the interfaces below.

Use this form inside input passed to nerdamer(...).

acos(arg1)

Call the operation through the default nerdamer import.

nerdamer.acos(x: ExpressionInput): Expression

Name	Type	Description
`x`	`ExpressionInput`	The input expression (domain `[-1, 1]` for real results).

Expression — The arccosine of `x` in radians.