SQL Server ASIN() Function

 The ASIN() function in SQL Server is a mathematical function that returns the arcsine (inverse sine) of a given number. The input value must be within the range -1 to 1, as these are the valid inputs for the arcsine function. The result is returned in radians, and it will be in the range -π/2 to π/2.

Syntax:

ASIN(float_expression)

Parameters:

• float_expression: A numeric expression between -1 and 1.

Returns:

• Data Type: float
• The arcsine value in radians.

Example Usage:

1. Basic Example:

   SELECT ASIN(0.5) AS ArcsineResult;
   

   Result: 0.523598775598299 (approximately π/6 radians).

2. Converting to Degrees: If you need the result in degrees instead of radians, use the following formula:

   SELECT ASIN(0.5) * (180.0 / PI()) AS ArcsineInDegrees;
   

   Result: 30.0 degrees.

3. Invalid Input: Providing a value outside the range -1 to 1 will result in an error:

   SELECT ASIN(1.5) AS InvalidResult;
   

   Error: "An invalid floating point operation occurred."

Practical Applications:

• The ASIN() function is commonly used in trigonometry-related computations, especially in applications involving geometry, physics, and engineering.

If you need further assistance or examples, feel free to ask!