To use this function, choose Calc > Calculator.

Determines the angle corresponding to a specified cosine. Arccosine is defined in radians from 0 to π. For example, the arccosine of 0.5 is π/6 or 0.5230 radians.

Arccosine (also called the inverse cosine) can be represented by cos-1 x, arccos x, or acos x.

Syntax

ACOS(number)

For number, specify the value or the column of values.

Example

Column Calculator expression Result
C1 contains 0 ACOS (C1) 1.566796316128

Uses

Trigonometric functions are used to model wave motion and periodic phenomena, such as seasonal patterns. They form the foundation for advanced analyses in electrical engineering, digital image processing, radiography, thermodynamics, telecommunications, and many other fields in science and technology.

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