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a
1
b
2
c
12
d
3
answer is B.
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Detailed Solution
Dividing the given DE by y2cosx−1y2⋅dydx+secx⋅1y=1−sinx⇒ddx1y+secx⋅1y=1−sinxI.F=∫e secx⋅dx=secx+tanx Solution if 1y(secx+tanx)=∫(1−sinx)(1+sinx)cosx=sinx+cx=0,y=1,⇒c=1∴y=secx,⇒yπ3=2