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Excel

COS is used in Excel to calculate the cosine of a given angle. The COS function takes one argument, the angle in radians, and returns the cosine of that angle. The COS function can be used in a number of different ways, including in the form of a VBA function.

The syntax of COS in Excel is as follows:

=COS(angle)

Where angle is the angle in radians that you want to calculate the cosine of.

There are many ways to use COS in Excel. One way is to use it in a VLOOKUP function. For example, if you want to find the cosine of 30 degrees, you can use the following formula: =COS(30). Another way to use COS is in a SUMIF function. For example, if you want to find the sum of all the values in a column that are cosine values, you can use the following formula: =SUMIF(B:B, ">=COS(0)", "B:B").

There are a few instances in which you should not use the COS function in Excel. One such instance is when you are trying to find the cosine of a negative number. Additionally, if you are trying to find the cosine of a number that is greater than or equal to 1, the COS function will return an incorrect result.

The Excel formulae COS, SIN, and TAN all compute trigonometric functions. COS computes the cosine of a number, SIN computes the sine of a number, and TAN computes the tangent of a number.

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