Question

The integrating factor of the differential equation (1 +y2)dx - (tan-1 y - x)dy = 0, is :

• A. tan-1 y
• B. $e^{\tan^{-1}y}$
• C. $\frac{1}{1+y^2}$
• D. $\frac{1}{x(1+y^2)}$

Answer 1

Answer: (B)

$e^{\tan^{-1}y}$

Answer 2

The correct option is (B) :$e^{\tan^{-1}y}$.