BrightSign BrightScript 2 Reference Guide - Manual (Page 41)

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Sgn(x As Float) As Integer
Sgn(x As Integer) As Integer
The "sign" function: returns -1 for X negative, 0 for X zero, and +l for X positive.
Sin(x As Float) As Float
Returns the sine of the argument (argument must be in radians). To obtain the sine of X
when X is in degrees, use SIN(X*.01745329).
Sqr(x As Float) As Float
Returns the square root of the argument. SQR(X) is the same as X^(1/2), only faster.
Tan(x As Float) As Float
Returns the tangent of the argument (argument must be in radians). To obtain the tangent
of X when X is in degrees, use TAN(X*.01745329).