The SSRS Acos function is a Mathematical function that returns the trigonometric arc cosine value, i.e., the angle of the given cosine number. The syntax of the Acos arc cosine function to return the angle of the given cosine numeric field is as shown below.
=Acos(0.5)
=Acos(Fields!Angle.Value)
To demonstrate the Reporting Services Acos function, we use the Products table below, which has 14 records. The image shows the records in the table report; the result is in an empty column.
SSRS Acos function Example
For this, right-click the textbox under the Result Header and choose the Expression to open the window below. The SSRS Acos function expression below finds the arc cosine value of the Service Grade field or column in the Product table, i.e., the angle.
=Acos(Fields!Service_Grade.Value)
Please click the preview tab to see the report. Please use the Round function to adjust the decimal precisions.