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**Inverse Tangent Calculator**

Trigonometric inverse tangent calculator

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**What is inverse tangent?**

Inverse tangent is the inverse of basic tan function.
In the tan function, value of *angle θ* is taken to give the ratio *opposite/adjacent*.
However, inverse tan function takes the ratio *opposite/adjacent* and gives *angle θ*.

tan^{-1 (opposite/adjacent)} = θ

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**Inverse tangent symbol**

Inverse tangent is represented as **tan ^{-1}** or

**arctan**.

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**Inverse tangent rule**

The inverse tan rule is given as:

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y = tan ^{-1} (x)
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**Formula**

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tan ^{-1}(-x) = -tan^{-1}(x), where x ∈ R
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**Inverse tangent derivative**

The derivative of inverse tangent function is first-order derivative. It is given as:

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dy/dx = 1 / 1 + x ^{2}
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