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    Graduate Non linear 2nd order ode not able to solve

    thx for the input really appreciated
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    Graduate Non linear 2nd order ode not able to solve

    u'u''-k1u=-a*cos(hy)-b where,u'=du/dy; and and a,b,k1 are constants conditions u(-H)=0; u'(0)=0; where 2H is height of the channel where the liquid is flowing please help any suggestions are welcome i couldn't find the analytical soln numerical soln also am havin a dead end so please