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[int(dx)/(cos x-sin x)" is equalto: "],[...

[int(dx)/(cos x-sin x)" is equalto: "],[[" (a) "(1)/(sqrt(2))" logitan "((x)/(2)-(pi)/(8))+c," (b) "(1)/(sqrt(2))log log((x)/(2))*c],[" (c) "(1)/(sqrt(2))" loglan "((x)/(2)-(3 pi)/(8))+c," (d) "(1)/(sqrt(2))log(log((x)/(2)+(x)/(8))+c]]

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int(dx)/(cosx-sinx) is equal to a) (1)/(sqrt(2))log|tan(pi/2-pi/8)|+c b) (1)/(sqrt(2))log|cot(x/2)|+c c) (1)/(sqrt(2))log|tan(pi/2-(3pi)/(8))|+c d) (1)/(sqrt(2))log|tan(x/2+(3pi)/(8))|+c

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int(1)/(sqrt(x^(2)-a^(2)))=log(x+sqrt(x^(2)-a^(2))+c