COS Excel function is an inbuilt trigonometric function in excel which is used to calculate the cosine value of given number or in terms or trigonometry the cosine value of a given angle, here the angle is a number in excel and this function takes only a single argument which is the input number provided.
Syntax: =COS (number)
The COS function syntax has the following arguments:
- number – an angle in radians for which we want the cosine
- If an angle is given in degrees, convert it to radians by using the RADIANS function or multiplying the angle by PI()/180
Example: Let’s look at some Excel COS function examples and explore how to use the COS function as a worksheet function in Microsoft Excel:
Based on the Excel spreadsheet above, the following COS examples would return: