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int (dx)/(9cos^2 x + 16sin^2 x) =?
int (dx)/(9cos^2 x + 16sin^2 x) =?
1/(4 ×3) tan^-1((4tan x)/3) + c
(Correct)4/3 tan^-1((4tan x)/3) + c
(Incorrect)tan^-1((3tan x)/4) + c
(Incorrect)tan^-1((4tan x)/3) + c
(Incorrect)
