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Q.

If functions u=exsinxandv=excosxsatisfy the equation 

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a

V.dudxudvdx=u2+v2

b

V.dudx+udvdx=u2+v2

c

dudx+dvdx=2v

d

dudx+dvdx=2u

answer is A, C.

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Detailed Solution

u=exsinx   &  v=excosx
dudx+dvdx=2excosx=2vdudx=u+v  and  dvdx=vuvdudx=uv+u2&  u.dvdx=uvu2
vdudxu.dvdx=v2+u2

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If functions u=ex sinx  and v=excosx  satisfy the equation