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

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, …

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 …

Arccos calculator to easily calculate the arc cosine (inverse cosine) function of any number. Calculate arccos (x) in degrees and radians with this trigonometric calculator.

Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more.

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

Oct 29, 2025 · The arccos graph represents the inverse of the cosine function. It shows how the cosine function can be reversed to find the angle that corresponds to a given cosine value. As …

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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