Question-61675

Question Number 61675 by peter frank last updated on 06/Jun/19

Commented by peter frank last updated on 06/Jun/19

f i n d s o l u t i o n o f D . E

Answered by ajfour last updated on 06/Jun/19

\frac{x^{4} d y}{d x} + x^{3} y + \sec x y = 0

\Rightarrow x (\frac{d y}{d x}) + y = - \frac{\sec x y}{x^{3}}

\Rightarrow \int \cos (x y) d (x y) = - \int \frac{d x}{x^{3}}

\Rightarrow \sin (x y) = \frac{1}{2 x^{2}} + c .

Commented by peter frank last updated on 06/Jun/19

t h a n k y o u