ATAN

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Name

Arctangent

Description

Returns the angle whose tangent is the specified value. The angle is in radians between –π/2 and π/2.

Syntax

ATAN(value)

Remarks

The value argument is the tangent of the angle you want to return and must be between –1 and 1. If you want to convert the result to degrees, multiply it by 180/π.

See also ACOS, ACOSH, ASIN, ASINH, ATAN2, ATANH, COS, COSH, SIN, SINH, TANH, and TAN.

Data Type

Accepts numeric data. Returns numeric data. For more information, see Data Type for Each Cell Type.

Example

ATAN(R1C2)
ATAN(B3)
ATAN(1)=0.7853981634