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ATAN

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This function calculates the arctangent, that is, the angle whose tangent is the specified value.

ATAN(*value*)

For the argument, specify the tangent of the angle you want to return, which must be a value between –1 and 1.

The result angle is in radians between –PI/2 and PI/2. If you want to convert the result to degrees, multiply the result by 180/PI.

Accepts numeric data. Returns numeric data.

ATAN(B3)

ATAN(R3C2)

ATAN(1) gives the result 0.7853981634

See Also