Math Chapter Wise Ordinary And Partial Differential Equations, Integral Equations And Calculus Of Variations English MCQ KVS PGT 2023 Q.The solution of the differential equation () 2 2 dy 1 x 1 y 0 dx + + + =, is: A1 1 tan x tan y c − − − = B1 1 tan y tan x c − − ± = C1 1 tan y tan x c − − − = D1 1 tan x tan y c − − + = Show answer Correct answer: 1 1 tan x tan y c − − + =