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[int(-pi/2)^( pi/2)(sin^(2n-1)x)/(1+cos^...

[int_(-pi/2)^( pi/2)(sin^(2n-1)x)/(1+cos^(2n)x)dx=],[[" (a) "(pi)/(2)," (b) "-(pi)/(2)],[" (c) "0," (d) "pi]],[" (c) "]

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