Question

The integrating factor of $x \cos x \frac{dy}{dx} + (x \sin x + \cos x) y = 1$ is}

• A. $x \sin x$
• B. $x \cos x$
• C. $x \sec x$
• D. $x \csc x$

Hint:

Always ensure the coefficient of $dy/dx$ is 1 before identifying $P(x)$ for the integrating factor formula.

Answer 1

The Correct Option is B