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[" 57.If "I(1)=int(1/e)^( tan x)(t)/(1+t...

[" 57.If "I_(1)=int_(1/e)^( tan x)(t)/(1+t^(2))dt" and "I_(2)=int_(1/e)^( cot x)(dt)/(t(1+t^(2)))" then "],[" the value of "I_(1)+I_(2)" is "],[[" 1) "1/2," 2) "1],[" 3) "e/2," 4) "(1/2)(e+1/e)]]

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