How the ACOS() function works in Mariadb?

The ACOS() function in MariaDB is used to calculate the arc cosine of a number.

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The ACOS() function in MariaDB is used to calculate the arc cosine of a number. It returns the arc cosine of a number in radians, which is the inverse of the cosine function.

Syntax

The syntax for the MariaDB ACOS() function is as follows:

ACOS(number)

The number parameter is a numeric value between -1 and 1 for which you want to find the arc cosine. The function returns the arc cosine of number in radians.

Examples

Arc Cosine of 1

To find the arc cosine of 1:

SELECT ACOS(1);

0

The output is 0 radians, which is the arc cosine of 1.

Arc Cosine of 0

This example calculates the arc cosine of 0:

SELECT ACOS(0);

1.5707963267948966

The output is approximately 1.57 radians, which is ( \frac{\pi}{2} ) radians, the arc cosine of 0.

Arc Cosine of -1

To find the arc cosine of -1:

SELECT ACOS(-1);

3.141592653589793

The output is approximately 3.14 radians, which is ( \pi ) radians, the arc cosine of -1.

Arc Cosine of a Decimal

Calculating the arc cosine of a decimal number:

SELECT ACOS(0.5);

1.0471975511965979

The output is approximately 1.05 radians, which is the arc cosine of 0.5.

Arc Cosine in an Expression

Using ACOS() in an expression with other functions:

SELECT ACOS(ROUND(COS(1), 2));

1.0003592173949747

The output is 1 radian, which is the arc cosine of the cosine of 1, rounded to two decimal places.

Here are a few functions related to MariaDB’s ACOS():

  • MariaDB COS() function is used to find the cosine of a number.
  • MariaDB ASIN() function calculates the arc sine of a number.
  • MariaDB ATAN() function finds the arc tangent of a number.

Conclusion

The ACOS() function is an important trigonometric function in MariaDB that allows you to find the arc cosine of a number, providing the angle in radians whose cosine is the given number. It is especially useful in geometric calculations and when working with angles in various mathematical and scientific applications. Understanding how to use ACOS() effectively can be a valuable skill in database management and analysis.