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Question: Answered & Verified by Expert
Integrating factor of differential equation $\cos x \frac{d y}{d x}+y \sin x=1$ is
MathematicsDifferential EquationsJEE Main
Options:
  • A $\cos x$
  • B $\tan x$
  • C $\sec x$
  • D $\sin x$
Solution:
1019 Upvotes Verified Answer
The correct answer is: $\sec x$
$\frac{d y}{d x}+y \tan x=\sec x$
I.F. $=e^{\int \tan x d x}=e^{\log \sec x}=\sec x$

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