# Excel SIN Function

This post will guide you how to use** Excel SIN function** with syntax and examples in Microsoft excel.

**Description**

The Excel SIN function returns the sine of a given angle. If you want to supply an angle to SIN function in degrees, then you need to multiply the angle by PI()/180. Or you can use the RADIANS function to the angle to radians.

The SIN function is a build-in function in Microsoft Excel and it is categorized as a Math and Trigonometry Function.

The SIN function is available in Excel 2016, Excel 2013, Excel 2010, Excel 2007, Excel 2003, Excel XP, Excel 2000, Excel 2011 for Mac.

**Syntax**

The syntax of the SIN function is as below:

=SIN (number)

Where the SIN function argument is:

**number –**This is a required argument. A number that used to be calculate the sine of an angle.

**Note:**

- If your argument is in degrees, multiply it by PI()/180 or use the RADIANS function to convert it to radians.

### Excel SIN Function Examples

The below examples will show you how to use Excel SIN Function to return the sine of an angle.

**1#** get the sine of pi radians, enter the following formula in Cell B1.

=SIN(PI())

**2#** get the sine of pi/2 radians, enter the following formula in Cell B2.

=SIN(PI()/2)

**3#** get the sine of 45 degrees, enter the following formula in Cell B3.

=SIN(45*PI()/180)

Or using the another formula to get the same result as follow:

=SIN(RADIANS(45))

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