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find-I-n-pi-2-pi-2-e-ax-cos-2n-xdx-




Question Number 31068 by abdo imad last updated on 02/Mar/18
find  I_n =∫_(−(π/2)) ^(π/2)  e^(−ax)  cos^(2n) xdx  .
findIn=π2π2eaxcos2nxdx.

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