The RADIANS function returns the argument x specified in degrees converted to a radian value. The return value is a DOUBLE type.
RADIANS ( x )
SELECT RADIANS(90), RADIANS(180), RADIANS(360);
radians(90) radians(180) radians(360)
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1.570796326794897e+00 3.141592653589793e+00 6.283185307179586e+00