Returns the arc cosine of a specified numeric expression.

ACOS(nExpression)

Parameters

nExpression

Specifies a numeric expression whose arc cosine ACOS( ) returns. The value of nExpression can range from –1 through +1. The value returned by ACOS( ) ranges from 0 through pi (3.141592). The number of decimal places ACOS( ) returns is determined by SET DECIMALS.

Use RTOD( ) to convert radians to degrees.

Return Value

Remarks

Example

	Copy Code
CLEAR ? RTOD(ACOS(0)) && Displays 90.00 STORE -1 to gnArcAngle ? RTOD(ACOS(gnArcAngle)) && Displays 180.00 ? RTOD(ACOS(SQRT(2)/2)) && Displays 45.00

See Also

Reference

SIN( ) Function
ASIN( ) Function
COS( ) Function
TAN( ) Function
ATAN( ) Function
ATN2( ) Function
DTOR( ) Function
RTOD( ) Function
PI( ) Function
SET DECIMALS Command

Other Resources

Functions
Language Reference (Visual FoxPro)