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Google Sheets

The ACOS function in Google Sheets is used to calculate the arccosine of a given number. The function takes in a single argument, which is the number you want to calculate the arccosine of. The function will return the arccosine of the number, in radians.

The syntax for ACOS in Google Sheets is as follows:

ACOS(number)

This function takes a number as an input and calculates the arc cosine of that number.

One way to use the ACOS function in Google Sheets is to find the angle between two points on a coordinate plane. For example, if you wanted to find the angle between the points (2, 3) and (4, -5), you would enter the following formula into a cell in Google Sheets:

=ACOS( (4-2) / (5-3) )

This would return the angle in radians between the two points. You can then convert this value to degrees by using the following formula:

=180*ACOS( (4-2) / (5-3) )

There are a few occasions when you should not use the ACOS function in Google Sheets. One instance is when you are trying to find the cosine of a number, as the ACOS function will return an incorrect value in this case. Additionally, the ACOS function should not be used when trying to find the arc cosine of a number, as this is also not a valid function.

There are a few similar formulae to ACOS in Google Sheets. One is SIN, which calculates the sine of a given number. Another is TAN, which calculates the tangent of a given number. Lastly, COS calculates the cosine of a given number.

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