Teaching EMRS PGT Mock Test 2023 Mathematics Differential Equations

অন্তরকল সমীকরণ tan y sec2x dx + tan x sec2y dy = 0 এর সমাধান হল :

1
tan x + tan y = k
2
tan x - tan y = k
3
\(\rm\frac{\tan x}{\tan y}\) = k
4
tan x . tan y = k
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