Q.
The solution of the DE cosxdy=y(sinx−y)dx,0
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a
tanx=(secx+c)y
b
secx=(tanx+c)y
c
ysecx=tanx+c
d
ytanx=secx+c
answer is B.
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Detailed Solution
dydx=ytanx−y2secx⇒1y2dydx−1ytanx=−secxt=1ydtdx=⋅−1y2dydx→−dtdx−tanxt=−secx→dtdx+(tanx)t=secx I.F. =e∫tanxdx=secxtsecx=∫sec2x dxtsecx=tanx+c1ysecx=tanx+c
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