Reply To: RI, Tangent Ratio, CA questions › Forums › General Discussion › RI, Tangent Ratio, CA questions › Reply To: RI, Tangent Ratio, CA questions August 2, 2023 at 5:41 pm #16860 ozgurertanParticipant @ozgurertan I have found this link as a calculator hope this helps, I had the old calculator but could not find now , hope this works,https://www.calc2web.com/calculators/pid-1547.htm