cos^5x,cosx与cosx

4-1不定积分 换元法1
解法1∫sin^6xdx(1/6)sin^5xcosx(5/24)sin^3x(5/16)cosxsinx
数学∫cos^4xsin2xdx∫cos^4x2sinxcosxdx=2∫cos^5xsinxdx-2∫cos^
2x0,x若f(x=5x=0,求limf(x)cos2x x0._百度教育
求函数y=sin 3x cos 5x的最小正周期.