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Arccosine, written as arccos or cos -1 (not to be confused with ), is the inverse cosine function. Both arccos and cos -1 are the same thing. Cosine only has an inverse on a restricted domain, 0 ≤ x ≤ π. …

Online arccos (x) calculator. Inverse cosine calculator. Enter the cosine value, select degrees (°) or radians (rad) and press the = button.

What is Arccosine Formula? In a right triangle, if θ is one of the acute angles, then cos θ = (adjacent)/ (hypotenuse). Then θ = arccos ( (adjacent)/ (hypotenuse). This is the formula of arccosine (or arccos).

Definition of the arccos function in trigonometry. The inverse of the cosine function. The angle whose cosine is a given number.

Use this arccos calculator to easily calculate the arccosine of a number. Supports input of either decimal numbers (e.g. 0.5, -0.5) or fractions (e.g. 1/2, -1/2).

If you know the three sides of a triangle, and you'd like to find any of the triangle's angles, you'll need to use arccos: find everything about this law at our law of cosines calculator.

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The arccosine is often written as arccos or acos. Starting with a given cosine value, the arccosine function calculates the angle x that produces it within the interval [0, π].

arccos (x), inverse cosine function. Definition, rules, graph and table.