y2z(x cos x- sin x) dx + d2z(y cos y-sin y) dy

Posted on 2014-03-29 10:07:00 in Math by HMAWRA

solve

                y²z(x cos x- sin x) dx + d²z(y cos y-sin y) dy

+ xy ( y sin x + x sin y + xy cos z) dz = 0     .....(1)

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