Math Chapter Wise Limit, Continuity And Differentiability Of Function Of One Variable English MCQ Jharkhand TGT 2017 Q.If for 'A' and 'B' are two parameters y = A cos3x + B sin 3x, then A2 d y 9y 0 dx + = B() 2 2 dy x y dx − –xy=0 Cdy x y 0 dx + = D2 d y x y 0 dx + = Show answer Correct answer: 2 d y 9y 0 dx + =