# SQLite ASIN function

The SQLite ASIN function is a mathematical function that calculates the inverse sine (also known as arc-sine) of a given value. In other words, it returns the angle (in radians) whose sine is equal to the specified value.

## Syntax

The syntax for the ASIN function is as follows:

```ASIN(x)
```

where x is the value for which the inverse sine is to be calculated.

The ASIN function takes a single argument, which must be a numeric value between -1 and 1. If the argument is outside this range, the function returns NULL.

The return value of the ASIN function is also a numeric value, expressed in radians. To convert this value to degrees, you can use the DEGREES function, like this:

```DEGREES(ASIN(x))
```

### Examples

Here are a few examples of using the ASIN function in SQLite:

```SELECT ASIN(0.5);
Returns 0.5235987755982989

SELECT DEGREES(ASIN(0.5));
Returns 30

SELECT ASIN(1.5);
Returns NULL (argument is out of range)
```

It’s worth noting that the ASIN function is just one of many mathematical functions supported by SQLite. Other functions include SIN, COS, TAN, SQRT, and LOG, among others. These functions can be useful in a wide range of applications, from scientific computing to financial analysis.