What is the arccosine?

The arccosine is the inverse cosine function. It returns the angle whose cosine is a given number. For example, arccos(0.5) is 60 degrees or π/3 radians because cos(60°) = 0.5.

Why does the input value need to be between -1 and 1?

The cosine function's range is [-1, 1]. Therefore, the arccosine function, being the inverse, is only defined for values within this range.

How is the result presented?

The result is presented in both radians and degrees, providing flexibility for different applications.

Arccosine Calculator

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Understanding Arccosine

The arccosine, denoted as arccos(x) or cos⁻¹(x), is the inverse cosine function. It returns the angle whose cosine is x. The domain of the arccosine function is [-1, 1], and the range is [0, π] in radians or [0, 180] in degrees.

The Math.acos Function

The Math.acos() function in JavaScript returns the arccosine of a number in radians. To convert radians to degrees, you multiply by (180 / π).

About

The Arccosine Calculator is a tool that calculates the arccosine (inverse cosine) of a value, displaying the result in both degrees and radians. The arccosine function is a key trigonometric function used to determine the angle whose cosine is a specified number. It is valuable for students, engineers, and anyone working with trigonometry.

Examples