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Does the Excel SIN Function Return Radians or Degrees?

  • The question of whether the Excel function returns radians or degrees is common, with many people not being sure of the exact answer. To get an elaborate answer to this question, you will have to read and understand this post as it uses illustrations to bring out the answer more vividly.
  • When we want to find the sine of an angle in excel, we are required to use the SIN function. The values of the angles are usually in degrees, and the SIN function will need the values to be converted before being supplied to it.
  • To convert the values from degrees to radians, the RADIANS function in excel.
  • Passing an angle in the form of degrees directly to the SIN function will result into an error, as the SIN function does not recognize the degrees.
  • As already mentioned, we can use the Excel built-in function, the RADIANS, to convert the degrees into radians.


Let us convert 300  to radians. This can be as shown below

=RADIANS(300)= 0.52

Figure 1. Final result

We can also use a mathematical formula to convert values from degrees to radians. This is as shown in the following illustration;

Radians = Degrees* PI()/180

The PI() is also a built-in function in excel, meaning you can use it whle working with excel worksheets.

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