# Arctangent

## Definition Of Arctangent

Arctangent is the inverse function of tangent. It is also written as arctan or tan-1. If y = tan x, then x = arctan y.

### Examples of Arctangent

tan-1 1 = 450 or arctangent (1) = 450. This means that the angle 450 has tangent equal to 1.

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