求不定积分sqrt（1+cos x)/sin x RT.还有其他解法的么SIn不在根号里

以下 S 表示积分符号.= = = = = = = = =因为 1 +cos x =2 [cos (x/2) ]^2,sin x =2 sin (x/2) cos (x/2),所以 根号(1 +cos x) /sin x =根号2 |cos (x/2)| / [ 2 sin (x/2) cos (x/2) ]=(根号2 /2) * sgn[ cos (x/2) ...