following built-in arithmetic functions: atan2( y , x ) Return the arctangent of y/x in radiansfollowing built-in arithmetic functions: atan2( y , x ) Return the arctangent of y/x in radiansfollowing built-in arithmetic functions: atan2( y , x ) Return the arctangent of y/x in radiansPOSIX systems). Arithmetic functions atan2( y,x ) Arctan of y / x betweenexponentiation) sin( x ) cos( x ) atan2( y , x ) log( x ) (base 10) exp( x ) (baseexponentiation) sin( x ) cos( x ) atan2( y , x ) log( x ) (base 10) exp( x ) (base