SIN

Description

The sine function (SIN) is a mathematical function used to calculate the sine value of a given angle. In SQL language, we can use the sin function to achieve this functionality. This function accepts one parameter and returns a value of type double.

Syntax

sin(expr)

Parameters

• expr: A double type value representing the angle for which the sine value needs to be calculated.

Return Value

Returns a double type value representing the sine value of the given angle.

Example Usage

1. Calculate the sine value of 0 radians:

SELECT sin(0);

Results:

0.0

2. Calculate the sine value of π/2 radians (i.e., 90 degrees):

SELECT sin(pi()/2);

Results:

1.0

3. Calculate the sine of π radians (i.e., 180 degrees):

SELECT sin(pi());

Results:

1.2246467991473532E-16

4. Calculate the sine value of 3π/2 radians (i.e., 270 degrees):

SELECT sin(3 * pi()/2);

Results:

-1.0

5. Calculate the sine value of a negative angle (-π/4 radians, i.e., -45 degrees):

SELECT sin(-pi()/4);

Results:

-0.7071067811865475

Precautions

• Ensure that the input parameter is a valid numerical value, otherwise it may lead to incorrect calculation results.
• When the input angle value is negative, the sine function will return the corresponding negative value.
• The sine function can be used in practical applications to solve trigonometric problems, vibrations, and wave issues.