[Solved] Solve a definite integral?

Questions
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1

Sir

I am doing some work on analyzing the frequency of plate for which I am required to solve the following equation. I tried to solve it, but not getting the final answer(numerical value). Attaching herewith the notebook.

integration.nb (3.1 KB)

2

Hi Vin

If you want numerical value, then try using NIntegrate

In[13]:= Clear[\[Epsilon], h]

In[22]:= h = 0.01; \[Epsilon] = 0.3;

In[23]:= NIntegrate[1.212*((1 - (1 - \[Epsilon]*Cos[(Pi*z)/h])^
              (1/2.3))/Cos[(Pi*z)/h]), {z, -h/2, h/2}]

Out[23]= 0.00167881
3

Thank you, it’s working.