Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
0 votes

If $ \cos x $ is an integrating factor of the differential equation $\large\frac{dy}{dx}$$+Py=Q$ then $P$=

\[\begin{array}{1 1}(1)-\cot x&(2)\cot x\\(3)\tan x&(4)-\tan x\end{array}\]

Can you answer this question?

1 Answer

0 votes
Given integrating factor $=\cos x$
then $P= \large\frac{\Large\frac{d}{dx}(\cos x)}{\cos x}$
$\qquad= \large\frac{- \sin x}{\cos x}$
$\qquad= -\tan x$
Hence 4 is the correct answer.
answered May 21, 2014 by meena.p
Ask Question
student study plans
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App