Computes the inverse sine (arc sine) of its argument; the result is a number in the interval [-pi/2, pi/2].
real_expr
This expression should evaluate to a real number greater than or equal to -1.0 and less than or equal to +1.0.
The data type of the return value is FLOAT.
Returns the arc sine in radians (not degrees) in the range [-pi/2, pi/2].
SELECT ASIN(0), ASIN(0.5), ASIN(1); ---------+--------------+-------------+ ASIN(0) | ASIN(0.5) | ASIN(1) | ---------+--------------+-------------+ 0 | 0.5235987756 | 1.570796327 | ---------+--------------+-------------+Copy
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