一X一 2 scc2x+tan2cos2e 11 11 x+*In cos2x 2 4 sec2x+tan2x 1 1 cos22x -In 2 4 1+sin2x cos2x 2 一+C 2 sinx+cosx x-sinc 2 sinx+cosx 1 一x+ In cosx-sinx|+c 15 15 1 1 ln sec2 tan 2 2 4 = − + x x x 1 ln cos2 4 + + x c 1 1 cos2 ln | | 2 4 sec2 tan 2 x x c x x = + + + 2 1 1 cos 2 ln | | 2 4 1 sin 2 x x c x = + + + 1 1 cos2 ln | | 2 2 sin cos x x c x x = + + + 2 2 1 1 cos sin ln | | 2 2 sin cos x x x c x x − = + + + 1 1 ln | cos sin | 2 2 = + − + x x x c