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# Trigonometric Functions

The following are the trigonometric functions that are supported in LibreOffice Basic.

## Atn Function

Trigonometric function that returns the arctangent of a numeric expression. The return value is in the range -Pi/2 to +Pi/2.

## Cos Function

Calculates the cosine of an angle. The angle is specified in radians. The result lies between -1 and 1.

## Sin Function

Returns the sine of an angle. The angle is specified in radians. The result lies between -1 and 1.

## Tan Function

Determines the tangent of an angle. The angle is specified in radians.

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