How to Use Trig Functions in Excel. Excel has built-in functions for sine and cosine, ... Click in cell B2 to enter the formula for converting the degrees in A2 to radians.

Before functions, to get an average, you would add a column of numbers; for example 10 numbers; then divide by that total (10). The AVERAGE function does that for you. So typing =AVERAGE(E2:E6 ...