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dunga4k89


0->pi/2\int_{}^{}sinxdx/(2+sinx)
bai nay neu sin2x thi dep. con sinx thi minh dat t=tanx/2 ma van khong ra.mong cac ban giup minh.cam on truoc
bai nay neu sin2x thi dep. con sinx thi minh dat t=tanx/2 ma van khong ra.mong cac ban giup minh.cam on truoc