Q.

Let y = y(x) be the solution curve of the differential equation sin2x2logetanx2dy+4xy42xsinx2π4dx=00<x<π2, which passes through the point π6,1. Then yπ3 is equal to _______

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answer is 1.

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Detailed Solution

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sin2x2lntanx2dy+4xy42xsinx2π4dx=0lntanx2dy+4xydxsin2x242xsinx2π4sin2x2dx=0dylntanx242xsinx2cosx222sinx2cosx2dx=0dylntanx24xsinx2cosx2sinx2+cosx221dx=0

dylntanx2+2dtt21=0ylntanx2+212lnt1t+1=cylntanx2+lnsinx2+cosx21sinx2+cosx2+1=c Put y=1 and x=π61ln13+ln12+32112+32+1=c Now x=π3y(ln3)+ln12+32112+32+1=ln13+ln313+3y(ln3)=ln13y=1|y|=1

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