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# Cosine, inverse cosine trigonometric function online calculation

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### App description

Inverse cosine ArcCos online calculation - trigonometric function

The inverse cosine in an inverse trigonometric function. Generally used to indicate when the angle is a non-special angle.

The inverse cosine in an inverse trigonometric function. Meaning: the inverse of the cosine, the function is y=arccosx

Is the known cosine value, reverse the angle, such as cos (a) = b, then arccos (b) = a;

Its value is expressed in radians. Definition domain: [-1,1].

### Usage example

Input value: 1

Inverse trigonometric function: Click "calculate arccosine" and output the result

Degree: The ArcCosine 1 = 0 degree