The general solution of the differential equation, sin 2 x ( d y d x-√tan x )-y=0, is :
JEE Main 2014 — Mathematics Calculus
2014mcqmedium
The general solution of the differential equation, sin2x(dxdy−tanx)−y=0, is :
Official previous-year question
Held on 12 Apr 2014 · Verified 6 Jul 2026.
Options
A
ytanx=x+c
B
ycotx=tanx+c
C
ytanx=cotx+c
D
ycotx=x+c
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Solution
Given, sin2x(dxdy−tanx)−y=0 or, dxdy=sin2xy+tanx or, dxdy−ycosec2x=tanx Now, integrating factor (I.F) =e∫−cosec2x or, I.F =e−21log∣tanx∣=elog(tanx)−1=tanx1=cotx Now, general solution of eq. (1) is written as y (I. F.) =∫Q( I.F.) dx+c∴ycotx=∫tanx⋅cotxdx+c∴ycotx=∫1.dx+c
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