So, from this problem, you see that both the components have to be, will be dominating and dictating the force acting on the pile. We go further to obtain the values of k d sin h k d, cos h k d and tan h k d. What I would suggest is such a problem is given and if you would like to look at the wave tables. Once, you calculate your D by L naught immediate at the same time you can just extract the values for all these variables. And keep it ready so that, your time saved in referring to the tables for each and every parameter now and then.