Okay, the formula that I am working from is:

(RL+S) – sqrt [ RL^2 – (S*sin CA)^2 ] – S*cos CA

RL = 5.090
S = 1.5
CA = 107.5

With numbers plugged in:

(5.090+1.5) - sqrt [5.090^2 - (1.5*sin (107.5))^2] - 1.5*cos (107.5)

The final answer should be 2.156.

How can I put this into an Excel spreadsheet so I can just change out the 3 inputs and get the correct answers for each?

I am using Excel 2007.

Thanks for any help!