Real surface area using a Raster Calculator in ArcGIS Pro

Question

I have a slope dataset. I have to count its real surface area using the following equation:
The count of the cells is 5839737. I tried to input the raster set and the count of cells in the equation but the calculator fails every time.

5839737 / Cos (["Reclass10"]) * 3.1415 /180

I input the above algebra expression which is wrong.

What can I do to correct the algebra expression?

danretired · Answer

Glad it worked out.  It is the small things usually.

jahillganvar · Answer

kinda very late but removing the [] worked! thank you so much

danretired · Answer

other than the numbers, did you type anything else, rather than selecting from what is provided?

the [ ] brackets don't look correct since Cos isn't for a list, but a raster