Use a graphing calculator to graph Y?, Y?, and Y? + Y? on the same screen. Evaluate each of the three functions at X = (7?/6), and verify the following equality.Y? (7?/6) +Y?(7?/6) = (Y? + Y?)(7?/6)Y? = cosX, Y? = secXY? (7?/6) = (Type an integer or decimal rounded to three decimal places as needed.)Use the graphing functions of your calculator to evaluate Y? at (7?/6).Y?(7?/6)= -1.155.(Type an integer or decimal rounded to three decimal places as needed.)Use the graphing functions of your calculator to evaluate Y? +Y? at (7?/6).(Type an integer or decimal rounded to three decimal places as needed.)