asin(x): Returns the inverse sine of x : asin « Math Functions « PostgreSQL

1. PostgreSQL
2. Math Functions
3. asin

asin(x): Returns the inverse sine of x

postgres=# -- asin(x): Returns the inverse sine of x
postgres=# SELECT asin(1), asin(0), asin(-1),  asin(sin(1)) AS inverse_example;
      asin       | asin |       asin       | inverse_example
-----------------+------+------------------+-----------------
 1.5707963267949 |    0 | -1.5707963267949 |               1
(1 row)

postgres=#

           
       

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